Alphabetical (o) - Museums

Old Petersburg-Addison Historical Society, Inc. - - - Addison Pennsylvania
Old Jail Art Center, The - - - Albany Texas
Office of Historic Alexandria - - - Alexandria Virginia
Oklahoma Historical Society/Museum of the Western Prairie - - - Altus Oklahoma
Old Economy Village - - - Ambridge Pennsylvania
Oak Canyon Nature Center - - - Anaheim California
Oscar Anderson House Museum - - - Anchorage Alaska
Old Town Hall Museum - - - Andrews South Carolina
OLDE DERBY HISTORICAL SOCIETY - - - Ansonia Connecticut
Outagamie Co. Hist Soc - - - Appleton Wisconsin
Ohio University Botanical Gard - - - Athens Ohio
Oglethorpe University Museum - - - Atlanta Georgia
Omenala-Griot Afrocentric Teaching Museum - - - Atlanta Georgia
Outdoor Activity Center - - - Atlanta Georgia
Osceola Archeological Collection - - - Auburn Washington
Old Fort Western - - - Augusta Maine
OLD AURORA COLONY MUSEUM - - - Aurora Oregon
O. Henry Museum - - - Austin Texas
O'Fallon Historical Museum - - - Baker Montana
Oregon Trail Regional Museum - - - Baker City Oregon
Old Castle Museum - - - Baldwin City Kansas
off & Pinkard Galleries - - - Baltimore Maryland
Old Otterbein United Methodist Church - - - Baltimore Maryland
Old Bardstown Village Inc. - - - Bardstown Kentucky
Oscar Getz Museum of Whiskey History - - - Bardstown Kentucky
Osterville Historical Society - - - Barnstable Massachusetts
Old Independence Regional Museum - - - Batesville Arkansas
Old Arsenal Museum - - - Baton Rouge Louisiana
Old Bogan Central Firefighters Museum - - - Baton Rouge Louisiana
Oregon Trail Museum Assn. - - - Baton Rouge Louisiana
Ohio Design Centre - - - Beachwood Ohio
OLD COURT HOUSE MUSEUM - - - Beaver Utah
Old Bedford Village - - - Bedford Pennsylvania
Old Bethlehem Historical Society - - - Bethlehem Connecticut
Oliver Tucker Historic Museum - - - Beverly Ohio
Oscar's Dreamland Yesteryear Museum - - - Billings Montana
Ohr- O'Keefe Museum of Art - - - Biloxi Mississippi
Oris Glisson Hist. Costume and Textile Coll. - - - Blacksburg Virginia
Oakside Bloomfield Cultural Center - - - Bloomfield New Jersey
Old House Society - - - Bloomington Illinois
Old South Association in Boston - - - Boston Massachusetts
Old South Meeting House - - - Boston Massachusetts
Olympic College Art Gallery - - - Bremerton Washington
Oklahoma Forest Heritage Center - - - Broken Bow Oklahoma
Old Stone House Historic Interpretive Ctr. - - - Brooklyn New York
Old Spot Mortimer - - - Bruce South Dakota
Old Town Museum - - - Burlington Colorado
Orma J. Smith Museum of Natural History - - - Caldwell Idaho
Our Memories Museum - - - Caldwell Idaho
Openings in North Cambridge Studios - - - Cambridge Massachusetts
Overbeck Museum - - - Cambridge City Indiana
Ontario County Historical Society (Mus - - - Canandaigua New York
Old Sacramento Schoolhouse Museum - - - Carmichael California
Okaukee Art Center - - - Cedarburg Wisconsin
Ozaukee Art Center - - - Cedarburg Wisconsin
Ozaukee Cty Hist Society Pioneer Villa - - - Cedarburg Wisconsin
OLD WEST MUSEUM - - - Chamberlain South Dakota
Orpheum Children's Science Museum - - - Champaign Illinois
Old Exchange and Provost Dungeon - - - Charleston South Carolina
Old Fort No. 4 Associates - - - Charlestown New Hampshire
OCCONALUFTEE VISITOR CENTER - - - Cherokee North Carolina
Oriental Institute Museum~The - - - Chicago Illinois
Old Rock Island Depot, Cedar & 3rd St - - - Chillicothe Illinois
Oyster & Maritime Museum - - - Chincoteague Virginia
Old Trail Museum - - - Choteau Montana
Octorara Valley Historical Society - - - Christiana Pennsylvania
Old Mill Museum - - - Cimarron New Mexico
Oregon Military Museum - - - Clackamas Oregon
Oklahoma Military Academy Memorial - - - Claremore Oklahoma
Occoneechee State Park - - - Clarksville Virginia
Octagon House - - - Clayton Alabama
Oklahoma Route 66 Museum - - - Clinton Oklahoma
Old Trail Town - - - Cody Wyoming
Old Colorado City Historical Society - - - Colorado Springs Colorado
Owen House - - - Columbiana Alabama
Ohio Camera Collector's Society - - - Columbus Ohio
Ohio Craft Museum - - - Columbus Ohio
Ohio Historical Society - - - Columbus Ohio
Ohio History of Flight Museum - - - Columbus Ohio
Orton Geological Museum - - - Columbus Ohio
OSU College of Optometry Museum - - - Columbus Ohio
Oxbow Meadows Environmental Learning Center - - - Columbus Georgia
Old Jail Museum - - - Crawfordsville Indiana
Old Homestead Parlour House Museum - - - Cripple Creek Colorado
Ohio Ceramic Center - Ohio Historical Society - - - Crooksville Ohio
Old Homestead - - - Crown Point Indiana
Old North College Museum - - - Dahlonega Georgia
Old City Park: The Historical Village of Dallas - - - Dallas Texas
Overlook Estate Foundation~The - - - Dalton Pennsylvania
Orange County Marine Institute - - - Dana Point California
Old Town Preservation Association - - - Danville Illinois
Old Jail Visitors Center - - - Dawsonville Georgia
Oakwood Historical Society - - - Dayton Ohio
Old State Bank - - - Decatur Alabama
Oklahoma Country-Western Museum - - - Del City Oklahoma
Old Line Historical Society - - - Delta Pennsylvania
Old Line Museum - - - Delta Pennsylvania
Old Church Cultural Center School of Art - - - Demarest New Jersey
Oregon Coast Sports Museum - - - Depoe Bay Oregon
Osborne Homestead Museum - - - Derby Connecticut
Old Mill Museum Assocation - - - Dundee Michigan
Old World Wisconsin - - - Eagle Wisconsin
Osborn-Jackson House - - - East Hampton New York
Orcas Island Hist. Museum - - - Eastsound Washington
Oakley Park, UDC Shrine - - - Edgefield South Carolina
Old Edgefield District Archives - - - Edgefield South Carolina
Old Town Museum - - - Elk City Oklahoma
Olmstead Place State Park - - - Ellensburg Washington
OREGON AIR & SPACE MUSEUM - - - Eugene Oregon
Oregon Aviation Museum - - - Eugene Oregon
Old Vanderburg County Courthouse - - - Evansville Indiana
Old Campbell County Historical Society - - - Fairburn Georgia
Ogden House - - - Fairfield Connecticut
Ozark Arts & Crafts Guild - - - Fayetteville Arkansas
Otter Tail County Historical Society - - - Fergus Falls Minnesota
Oakwoods Metropark Nature Center - - - Flat Rock Michigan
Old St. Ferdinand's Shrine - - - Florissant Missouri
Old Fort Johnson - - - Fort Johnson New York
Old Dillard Museum - - - Fort Lauderdale Florida
Old Fort Lauderdale Museum of History - - - Fort Lauderdale Florida
Oasis on the Plains Museum - - - Fort Morgan Colorado
Ohlone College Gallery - - - Fremont California
Old Mission San Jose Museum - - - Fremont California
Olive Hyde Art Gallery - - - Fremont California
Old Market House State Historic Site - - - Galena Illinois
Our House State Memorial - - - Gallipolis Ohio
Oregon Trail History and Education Center - - - Glenns Ferry Idaho
Orange County Historical Society - - - Goshen New York
Old Brown House Doll Museum - - - Gothenburg Nebraska
Old Post Office Museum and Art Center - - - Graham Texas
Oklahoma State Reformatory Museum - - - Granite Oklahoma
Old Six Mile Historical Society - - - Granite City Illinois
Old Grassy Butte Post Office - - - Grassy Butte North Dakota
Old Log Jail Museum - - - Greenfield Indiana
Old Fort Parker - - - Groesbeck Texas
Ostfriesian Heritage Society - - - Grundy Center Iowa
Oklahoma Sports Museum - - - Guthrie Oklahoma
Oklahoma Territorial Museum - - - Guthrie Oklahoma
Old Jail Museum - - - Hackett Arkansas
Optical Science Center & Museum - - - Hannibal Missouri
Old Brown's Mill School Museum - - - Harrisburg Pennsylvania
Old Fort Harrod State Park - - - Harrodsburg Kentucky
Ohio Co. Historical Society - - - Hartford Kentucky
Old State House - - - Hartford Connecticut
ORANGE COUNTY HISTORICAL MUSEUM - - - Hillsborough North Carolina
Old Ordinary - - - Hingham Massachusetts
Old City Hall Theatre - - - Hobart Oklahoma
Outdoor Discovery Center - - - Holland Michigan
Orchid Jungle/Fennell Orchid Company - - - Homestead Florida
Ocean Shores Center/Ocean City - - - Hoquiam Washington
Offshore Energy Museum - - - Houston Texas
Orange County Hemp Council Museum - - - Huntington Beach California
Oakwood College Archives & Museum - Eva B. Dykes Library - - - Huntsville Alabama
Old Iron County Courthouse Museum - - - Hurley Wisconsin
Old Choate House - - - Indianola Oklahoma
Office of the State Archaeologist - - - Iowa City Iowa
Old Capitol - - - Iowa City Iowa
Oaks House Museum - - - Jackson Mississippi
Old Capitol Museum of Mississippi History - - - Jackson Mississippi
Osage Village State Hist. Site - - - Jefferson City Missouri
Old York Road Historical Society - - - Jenkintown Pennsylvania
Overstreet-Kerr Historical Farm - - - Keota Oklahoma
Osceola Center for the Arts - - - Kissimmee Florida
Osceola County Historical Society & Pioneer Center Museum - - - Kissimmee Florida
Oldham County Hist. Society - - - La Grange Kentucky
Owen Co. Historical Society - - - La Grange Kentucky
Otero Museum - - - La Junta Colorado
Orange County Natural History Museum - - - Laguna Niguel California
OREGON ELECTRIC RAILWAY HISTORICAL SOCIETY - - - Lake Oswego Oregon
Old Las Vegas Mormon Fort Historic Park - - - Las Vegas Nevada
Old Christ Church - - - Laurel Delaware
Ottawa Little Stone Church - - - Le Sueur Minnesota
Oatlands Plantation - - - Leesburg Virginia
Ordwav. Jr. Memorial Prairie - - - Leola South Dakota
Old Village Hall Museum - - - Lindenhurst New York
Old Mill Museum - - - Lindsborg Kansas
Osage Co Historical Society - - - Linn Missouri
Old State House Museum - - - Little Rock Arkansas
Onondaga County Parks Department Museum - - - Liverpool New York
Otis Gallery, Otis College of Art and Design - - - Los Angeles California
One Room School - - - Lusby Maryland
Oklahoma Railway Museum - - - Luther Oklahoma
Old City Cemetery - - - Lynchburg Virginia
Osage County Historical Society - - - Lyndon Kansas
Ocmulgee National Monument - - - Macon Georgia
Old Cannon Ball House Museum - - - Macon Georgia
Omaha Nation Cultural Preservation Committee - - - Macy Nebraska
Olbrich Botanical Gardens - - - Madison Wisconsin
Old Manchester Museum - - - Manchester Connecticut
Old Trails Historical Society - - - Manchester Missouri
Old Greer County Museum & Hall - - - Mangum Oklahoma
Old Brick House - - - Mannington West Virginia
Ohio State Reformatory Historic Site - - - Mansfield Ohio
Ohio River Museums - - - Marietta Ohio
Old Courthouse Museum - - - Marshall Texas
Ohio Society of Military History - - - Massillon Ohio
Ohio Baseball Hall - - - Maumee Ohio
Oklahoma State Penitentiary Museum - - - McAlester Oklahoma
Oklahoma Trolly Museum - - - McAlester Oklahoma
Old Falls Village/Menomonee Falls Hist - - - Menomonee Falls Wisconsin
Ottawa County Historical Society - - - Miami Oklahoma
Ottawa Tribe of Oklahoma - - - Miami Oklahoma
Old Lighthouse Museum - - - Michigan City Indiana
Old Governor's Mansion - - - Milledgeville Georgia
Orchard Lawn - - - Mineral Point Wisconsin
Ottawa County Historical Museum - - - Minneapolis Kansas
Oscar Howe Art Center - - - Mitchell South Dakota
Old Mobeetie Texas Association - - - Mobeetie Texas
Oakleigh Historic Complex - - - Mobile Alabama
Old Santee Canal Park - - - Moncks Corner South Carolina
Old Constitution House - - - Montpelier Vermont
Old Mill Museum - - - Moreland Georgia
Old Town House - - - Moultonboro New Hampshire
Oaklands Association, Inc. - - - Murfreesboro Tennessee
Old Timers Museum - - - Murphys California
Old Bradford Pioneer Village - - - Nashua Iowa
Opryland Hotel - - - Nashville Tennessee
Old Harbin Hotel - - - Nauvoo Alabama
Old Freighter's Museum - - - Nebraska City Nebraska
Ohio-Hocking Forestry Museum - - - Nelsonville Ohio
Old Mill Museum - - - New Milford Pennsylvania
Ogden Museum of So. Art - UNO - - - New Orleans Louisiana
Old Merchants House - - - New York New York
One-Room Schoolhouse Museum - - - Newark Illinois
Oregon Coast Aquarium - - - Newport Oregon
Orange County Museum of Art - - - Newport Beach California
Oppenheim Zoological Society o - - - Niagara Falls New York
Ohef Sholom Temple Archives - - - Norfolk Virginia
OLD DOMINION UNIVERSITY ART GALLERY - - - Norfolk Virginia
Oklahoma Institute of Indian Heritaage - - - Norman Oklahoma
Olompali State Historic Park - - - Novato California
OREGON TRAIL AGRICULTURAL MUSEUM - - - Nyssa Oregon
O'Fallon Historical Society - - - O'Fallon Missouri
O'Fallon Historical Society, Inc. - - - O'Fallon Illinois
Oak Park Conservatory - - - Oak Park Illinois
Oak Ridge Community Art Center Museum - - - Oak Ridge Tennessee
Oakham Historical Museum, Inc. - - - Oakham Massachusetts
Oakland Historical Society - - - Oakland Iowa
Oakland Museum of California - Sculpture Court at City Center - - - Oakland California
Oakland Museum of California Foundation - - - Oakland California
Oakland Zoo - - - Oakland California
Oakland Park Historical Society - - - Oakland Park Florida
Oakland Park Historical Society - - - Oakland Park Florida
Oakley Valley Museum - - - Oakley Idaho
Old York - - - Oakman Alabama
OAKRIDGE-WESTFIR PIONEER MUSEUM - - - Oakridge Oregon
Oaks Indian Mission - - - Oaks Oklahoma
Oberlin Heritage Center/O.H.I.O - - - Oberlin Ohio
Ocean City Historical Museum - - - Ocean City New Jersey
Ocean City Life Saving Station Museum - - - Ocean City Maryland
Oyster Station House Interpretive Center - - - Ocean Park Washington
Oceanside Historical Museum - - - Oceanside California
Oconomowoc Historical Society - - - Oconomowoc Wisconsin
Oconto Cty Hist. Soc. Museum - - - Oconto Wisconsin
Ocracoke Preservation Museum - - - Ocracoke North Carolina
Odessa Historisches Museum - - - Odessa Washington
Oelwein Area Historical Society Museum - - - Oelwein Iowa
OGDEN DUP MUSEUM - - - Ogden Utah
Ogden Nature Center - - - Ogden Utah
Ogden Union Station Museums - - - Ogden Utah
OIL CREEK RAILWAY HISTORICAL SOCIETY - - - Oil City Pennsylvania
Ojai Valley Historical Soc. & Museum - - - Ojai California
Okanogan County Historical Society & Museum - - - Okanogan Washington
Okfuskee County Historical Museum - - - Okemah Oklahoma
Oklahoma City Museum of Art - - - Oklahoma City Oklahoma
Oklahoma City National Memorial - - - Oklahoma City Oklahoma
Oklahoma City Univ. Hulsey Gallery - - - Oklahoma City Oklahoma
Oklahoma City Zoo - - - Oklahoma City Oklahoma
Oklahoma Firefighters Museum - - - Oklahoma City Oklahoma
Oklahoma Governor's Mansion - - - Oklahoma City Oklahoma
Oklahoma Heritage Association - - - Oklahoma City Oklahoma
Oklahoma Museum of African American Art - - - Oklahoma City Oklahoma
Oklahoma Museums Association - - - Oklahoma City Oklahoma
Oklahoma Visual Arts Coalition - - - Oklahoma City Oklahoma
Overholser Mansion - - - Oklahoma City Oklahoma
Oktaha Historical Society, Inc. - - - Oktaha Oklahoma
Old Bethpage Village Restoration - - - Old Bethpage New York
Old Orchard Beach Hist Society - - - Old Orchard Beach Maine
OLD SAYBROOK HISTORICAL SOCIETY - - - Old Saybrook Connecticut
Old Town Museum - - - Old Town Maine
Old Westbury Gardens - - - Old Westbury New York
Olean Historical and Preservation Society - - - Olean New York
Olmsted Historical Society - - - Olmsted Illinois
Olympia Children's Museum - - - Olympia Washington
Omaha Botanical Center, Inc. - - - Omaha Nebraska
Omaha Children's Museum - - - Omaha Nebraska
Omaha Home for Boys Visitors Center History Museum - - - Omaha Nebraska
Omro Area Historical Society - - - Omro Wisconsin
Onaga Historical Society - - - Onaga Kansas
Onalaska Area Historical Society - - - Onalaska Wisconsin
Oneida Community Mansion House - - - Oneida New York
Oneida Nation Museum - - - Oneida Wisconsin
Ontonagon County Hist'l Society Museum - - - Ontonagon Michigan
Oolagah Museum - - - Oolagah Oklahoma
Opelousas Mus. & Interpretative Center - - - Opelousas Louisiana
Opelousas Museum of Art - - - Opelousas Louisiana
OLD STONE WAREHOUSE - - - Orange Virginia
Orange County Historical Society - - - Orange Virginia
Orange Historical Society - - - Orange Massachusetts
ORANGE HISTORICAL SOCIETY - - - Orange Connecticut
Orange Beach Museum - - - Orange Beach Alabama
Orangeburg County Historical Society - - - Orangeburg South Carolina
Orchard Historical Society - - - Orchard Nebraska
Orchard Park Historical Society - - - Orchard Park New York
ORDERVILLE DUP MUSEUM - - - Orderville Utah
Ogle County Historical Society - - - Oregon Illinois
Oregon Area Historical Society - - - Oregon Wisconsin
OREGON CITY CARNEIGE CENTER - - - Oregon City Oregon
OREM DUP MUSEUM - - - Orem Utah
Oyster Ponds Historical Society - - - Orient New York
Oriskany Battlefield State Historic Site - - - Oriskany New York
Orland Historical Society - - - Orland Maine
Orland Historical Society - - - Orland Park Illinois
Orange County Historical Museum - - - Orlando Florida
Orange County Regional History Center - - - Orlando Florida
Orlando Museum of Art - - - Orlando Florida
Orlando Science Center - - - Orlando Florida
Orleans Historical Society - - - Orleans Massachusetts
Ormond Memorial Art Museum & Gardens - - - Ormond Beach Florida
Orono Historical Society - - - Orono Maine
Old Oroville Depot Historical Society - - - Oroville Washington
OROVILLE CHINESE TEMPLE - - - Oroville California
Old Cahawba Archaeological Site - - - Orrville Alabama
Orrville Historical Museum - - - Orrville Ohio
Orrville Railroad Heritage Society - - - Orrville Ohio
Old Brick House Historical Society - - - Orwell Ohio
Orwigsburg Historical Society - - - Orwigsburg Pennsylvania
Osawatomie Museum Foundation, Inc. - - - Osawatomie Kansas
Osborne County Historical Museum - - - Osborne Kansas
Osceola Historical Society - - - Osceola Wisconsin
Oshkosh Public Library - - - Oshkosh Wisconsin
Oshkosh Public Museum - - - Oshkosh Wisconsin
Old Jefferson Town - - - Oskaloosa Kansas
Osseo Historical Society - - - Osseo Wisconsin
Ossining Historical Society Museum - - - Ossining New York
Old Hotel Art Gallery - - - Othello Washington
Othello Community Museum - - - Othello Washington
Otisville Area Historical Assoc., Inc. - - - Otisville Michigan
Old Depot Museum - - - Ottawa Kansas
Ottawa Scouting Museum - - - Ottawa Illinois
Otway Community Historical Landmarks - - - Otway Ohio
Ouray County Historical Society - Ouray County Museum - - - Ouray Colorado
Overland Historical Society/Log House - - - Overland Missouri
Overland Park - - - Overland Park Kansas
Owasso Historical Museum - - - Owasso Oklahoma
Owatonna Arts Center - - - Owatonna Minnesota
Owensboro Area Museum of Science and History - - - Owensboro Kentucky
Owensboro Museum of Fine Art - - - Owensboro Kentucky
Oxford Historical Shrine Society - - - Oxford Georgia
Oxford Historical Society - - - Oxford Massachusetts
Oxford Library Museum - - - Oxford Massachusetts
Oxford Museum - - - Oxford Maryland
Oyster Bay Historical Society - - - Oyster Bay New York
Old Stone Jail Museum - - - Palmyra Virginia
Orange County Historical Museum - - - Paoli Indiana
Old Town Hall Museum - - - Park Falls Wisconsin
Oil & Gas Museum - - - Parkersburg West Virginia
Old Fort Boise Replica & Museum - - - Parma Idaho
Old Spanish Fort & Museum - - - Pascagoula Mississippi
Osage County Historical Museum - - - Pawhuska Oklahoma
Osage Tribal Museum, Library & Archives - - - Pawhuska Oklahoma
Orangetown Historical Museum & Archives - - - Pearl River New York
Old Church Center Dave Sasser Museum - - - Perkins Oklahoma
Orange Empire Railway Museum - - - Perris California
Old Clock Museum - - - Pharr Texas
Old First Reformed Church - - - Philadelphia Pennsylvania
Olympia Flagship - - - Philadelphia Pennsylvania
ORMISTON MANSION - - - Philadelphia Pennsylvania
Old Fort Bissell - - - Phillipsburg Kansas
Oakes-Beitman Library & Museum - - - Pleasant Hill Ohio
Old River Road School - - - Plymouth New Hampshire
Oakland County Pioneer & Historical Society - - - Pontiac Michigan
Ottawa County Chapter - Ohio Genealogical Society - - - Port Clinton Ohio
Ottawa County Historical Museum - - - Port Clinton Ohio
Old Indian Agency House - - - Portage Wisconsin
Oeering Oaks Rose Garden - - - Portland Maine
Old Church Society - - - Portland Oregon
Oregon Historical Society - - - Portland Oregon
OREGON JEWISH MUSEUM - - - Portland Oregon
Oregon Maritime Center & Museum - - - Portland Oregon
Oregon Museum of Science and Industry - - - Portland Oregon
Oregon Sports Hall of Fame - - - Portland Oregon
Oregon Zoo - - - Portland Oregon
O S Ranch Museum - - - Post Texas
Olde Princess Anne Days Inc. - - - Princess Anne Maryland
Owen Lovejoy Homestead - - - Princeton Illinois
Octave Chanute Aerospace Mus. Found. - - - Rantoul Illinois
Old Ice House Museum - - - Rapid City South Dakota
Old City Hall Gallery and Arts Center - - - Redding California
Old Rugged Cross Historical Society - - - Reed City Michigan
Osceola County Historical Museum - - - Reed City Michigan
Onslow County Museum - - - Richlands North Carolina
Old Dominion Railway Museum - - - Richmond Virginia
Old Stone Church Museum - - - Ringgold Georgia
Ohio County Historical Society Museum - - - Rising Sun Indiana
Olmsted County Historical Society - - - Rochester Minnesota
Old Rock Jail Museum - - - Rockford Alabama
Old Conway House and Museum - - - Rockport Maine
Ozark Natural Science Center - - - Rogers Arkansas
Olin Hall Gallery - - - Salem Virginia
Old Salley School Museum - - - Salley South Carolina
Old Town San Diego State Historic Park - - - San Diego California
Overfelt Botanical Gardens - - - San Jose California
O'Neill Museum - - - San Juan Capistrano California
Old Mission San Juan Capistrano - - - San Juan Capistrano California
Old House Guild of Sandusky - - - Sandusky Ohio
Old Hoxie House - - - Sandwich Massachusetts
Old Courthouse Museum - - - Santa Ana California
Office of The Secretary of State - - - Santa Fe New Mexico
Opus 40 and Quarryman's Museum - - - Saugerties New York
Oatland Island Education Center - - - Savannah Georgia
Old Fort Jackson - - - Savannah Georgia
Owens-Thomas House and Museum - - - Savannah Georgia
Osborn Cannon Ball House, Museum, and Garden - - - Scotch Plains New Jersey
Odyssey, The Maritime Discovery Center - - - Seattle Washington
Old Depot Museum - - - Selma Alabama
Olympic Game Farm - - - Sequim Washington
Old Shawnee Town - - - Shawnee Kansas
One-Hundred Third Ohio Volunteer Infantry Memorial - - - Sheffield Lake Ohio
Old Grant County Courthouse - - - Shepherdstown West Virginia
Oswayo Valley Historical Society - - - Shinglehouse Pennsylvania
OLD STONE HOUSE, SLIPPERY ROCK UNIVERSITY - - - Slippery Rock Pennsylvania
Old Mission Santa Ines - - - Solvang California
Old Dutch Parsonage, Office of NJ Heritage - - - Somerville New Jersey
Old Halsey Homestead - - - Southampton New York
Old Halsey Homestead - - - Southampton New York
Orphan Train Riders Museum - - - Springdale Arkansas
Old State Capitol State Hist. Site - - - Springfield Illinois
Oliver P. Parks Telephone Museum - - - Springfield Illinois
Oxford Historical Society, Warner Museum - - - Springville New York
Oldest House Museum Complex - - - St. Augustine Florida
Oliver House & Interpretive Center - - - St. Martinville Louisiana
Oktibbeha Heritage Museum - - - Starkville Mississippi
Overland Trail Museum - - - Sterling Colorado
Oklahoma Museum of Higher Education - - - Stillwater Oklahoma
Oklahoma State Univ. Bot. Garden - - - Stillwater Oklahoma
Old Central Museum of Higher Education - - - Stillwater Oklahoma
OSU. Museum of Natural & Culturw - - - Stillwater Oklahoma
Oak Grove Nature Center - - - Stockton California
Old Lighthouse Museum - - - Stonington Connecticut
Old Sturbridge Village - - - Sturbridge Massachusetts
Old Dorchester State Historic Site - - - Summerville South Carolina
Oakland Museum - - - Sutherlin Oregon
Onondaga Historical Association - - - Syracuse New York
Otoe County Museum of Memories - - - Syracuse Nebraska
Odyssey-Tallahassee Science Center - - - Tallahassee Florida
Old Colony Historical Society - - - Taunton Massachusetts
OLD ST PETER'S LANDMARK - - - The Dalles Oregon
ORIGINAL WASCO COUNTY COURTHOUSE MUSEUM - - - The Dalles Oregon
Old Caln Historical Society - - - Thorndale Pennsylvania
Old St. Hilary's - - - Tiburon California
Old Church of Santo Nino Museum - - - Tijeras New Mexico
Old Mulkey State Hist. Site - - - Tompkinsville Kentucky
Ocean County Historical Society - - - Toms River New Jersey
Office of Historic Sites - - - Trenton New Jersey
Office of Legislative Services - - - Trenton New Jersey
Old Barracks Museum - - - Trenton New Jersey
Old Firehouse #1 Children's Museum - Trinidad Jr. Historical Society - - - Trinidad Colorado
Overfield Tavern - - - Troy Ohio
Old Jail Museum - - - Truckee California
Old Pueblo Museum - - - Tucson Arizona
OLD PUEBLO TROLLEY, INC. - - - Tucson Arizona
Oklahoma Confederate Archives - - - Tulsa Oklahoma
Oklahoma Jazz Hall of Fame - - - Tulsa Oklahoma
Oxley Nature Center - - - Tulsa Oklahoma
Old Tavern Museum - - - Tuscaloosa Alabama
Old Rehobeth Museum - - - Union West Virginia
Obion County Museum - - - Union City Tennessee
Oneida County Historical Society - - - Utica New York
Odum Library - - - Valdosta Georgia
Olivas Adobe Historical Park - - - Ventura California
Old Court House Museum Eva Whitaker Davis - - - Vicksburg Mississippi
Old Town Victorville Heritage Preservation, Inc. dba California Route 66 Museum - - - Victorville California
Old State Bank - - - Vincennes Indiana
Oklahoma Historic Fashions, Inc. - - - Wagoner Oklahoma
Original Historic Fashion Museum & Research Center - - - Wagoner Oklahoma
Oconee State Park - - - Walhalla South Carolina
OLD JAIL MUSEUM - - - Warrenton Virginia
Octagon - - - Washington District of Columbia
Old Stone House - - - Washington District of Columbia
Old Washington - - - Washington Kentucky
Old Washington Historic State Park - - - Washington Arkansas
Olin Fine Arts Gallery - - - Washington Pennsylvania
Oxon Hill Farm - - - Washington District of Columbia
Octagon House- 1st Kindergarten - - - Watertown Wisconsin
OLD M AND ST. L. DEPOT MUSEUM - - - Watertown South Dakota
Okefenokee Heritage Center - - - Waycross Georgia
Okefenokee Swamp Park - - - Waycross Georgia
Old Stage Coach Stop - - - Waynesville Missouri
Ohme Gardens - - - Wenatchee Washington
Old Dry Road Farm - - - Wernersville Pennsylvania
Ohio Postal History Society - - - Westlake Ohio
Oglebay Institute Environmental Education Center - - - Wheeling West Virginia
Ohio Valley Children's Museum - - - Wheeling West Virginia
Old Cowtown Museum - - - Wichita Kansas
Ominsphere and Science Center - - - Wichita Kansas
OLD WILKES JAIL - - - Wilkesboro North Carolina
Old Stone Presbyterian Church - - - Winchester Virginia
Old Stone House Museum - - - Windsor New York
Oliver Ellsworth Homestead - - - Windsor Connecticut
Old Salem - - - Winston-Salem North Carolina
OLD WOODBURY HISTORICAL SOCIETY - - - Woodbury Connecticut
Ohio Railway Museum - - - Worthington Ohio
Orange Johnson House & The Old Rectory - - - Worthington Ohio
Old York Historical Society - - - York Maine
Old Fort Niagara Association - - - Youngstown New York
Oak Glen School House Museum - - - Yucaipa California