- Osawatomie Museum Foundation
- Osborne County Historical Msmn
- Oscar Getz Museum Of Whiskey
- Osceola County Historical Soc
- Oswego Historical Museum Svc
- Ottawa County Museum
- Ottawa County Museum
- Ottawa Scouting Museum
- Ouachita Valley Heritage
- Our Heritage & Cultural Ctr
- Our Memories Museum
- Owens Thomas House Museum
- Owensboro Area Museum-Science
- Owensboro Museum Of Fine Art
- Owls Head Trnprtn Museum
- Ownes-Thomas House Museum Shop
- Owyhee County Museum & Library
- Oz Museum
- Oz Museum
- P H Sullivan Museum-Genealogy
- Pacific Aviation Museum
- Pacific Tsunami Museum Inc
- Pacific Tsunami Museum Inc
- Page Farm & Home Museum
- Palm Beach Maritime Museum
- Palm Beach Maritime Museum
- Palm Harbor Historical Society
- Panama Canal Museum
- Paper Airplanes
- Paris Museum
- Park Museum Nathaniel
- Parke County Museum
- Parker Historical Museum
- Parker Ranch Historic Homes
- Parker Ranch Historic Homes
- Parker Ranch Visitor Ctr & Msm
- Parker Ranch Visitor Ctr & Msm
- Parx Foundation
- Pasarya Musuem Of Art
- Past Inc
- Patent Museum
- Patrons Of The Vatican Museums
- Paul Powell Home & Museum
- Paul Powell Home & Museum
- Paul Powell Home & Museum
- Paulding County Museum
- Pawnee Indian Village Museum
- Payette County Museum
- Peabody Printing Museum
- Peabody Printing Museum
- Pearl Button Museum
- Pebble Hill Plantation
- Pejepscot Historical Society
- Pemaquid Point Lighthouse
- Pendleton Historical Museum
- Pennyroyal Area Museum
- Penobscot Marine Museum
- Penobscot Marine Museum Store
- Penobscot Nation Museum
- Pensacola Historical Museum
- Pensacola Museum Of Art
- Peoria Historical Society
- Peoria Historical Society
- Perry County Jail Museum
- PERRY County Museum
- Perryville Community Ctr
- Petit Paris Museum
- Phelps House
- Phosphate Museum
- Piatt County Museum
- Pike County Historical Society
- Pinellas County Musueum
- Pinellas Pioneer Settlement
- Pioneer Florida Museum
- Pioneer Florida Museum
- Pioneer Heritage Museum
- Pioneer Museum
- Pirate Soul
- Pitot House
- Plainfield Historical Society
- Planetarium-Miami Space Transt
- Plantation Historical Museum
- Platen Press
- Pleasant Hill Harman Museum
- Plymouth County Museum
- Pointe Coupee Historical
- Pointe Coupee Museum
- Poland Spring Preservation
- Polasek Albin Msm & Sculpture
- Polk County Historical Society
- Polk Museum Education Dept
- Pompano Beach Historical
- Pony Express Barn Museum
- Poos Museum
- Port Columbus Civil War Naval
- Porter House Museum
- Portland Harbor Museum
- Portland Museum
- Portland Museum Of Art
- Post Rock Museum
- Post Rock Scout Museum
- Potter's Wax Museum
- Potters Wax Museum
- Prairie Aviation Museum
- Prairie Aviation Museum Dev
- Prairie Museum Of Art & Hstry
- Prairie Trail Museum
- Prairieland Heritage Museum
- Prairieland Heritage Museum
- Pratt County Historical Museum
- Preservation Partners Of Fox
- Presque Isle Historical
- Pribble Museum Of Arcadian
- Priest Lake Museum
- Prill School Museum Assn
- Princeville Historical Assn
- Princeville Historical Assn
- Pullman Archives
- Pullman Archives
- Purvis Young Museum
- Putnam County Historical
- Putnam County Historical
- Putnam County Museum
- Putnam Museum & Imax Theatre
- Ragtops Automobile Museumof
- Rails West Railroad Museum
- Ralph Gilbert Mark Civil Rghts
- Ralph Richards Museum
- Randolph County Historical
- Ransom Place Neighborhood Assn
- Ratcliff Inn Museum
- Ratcliff Inn Museum
- Rawlins County Historical Scty
- Rayne City Museum
- Red Rock Visitor Center
- Reitz Home Museum
- Reneker Museum-Winona Hstry
- Reno County Historical Society
- Republic County Museum
- Republic Of W Florida Museum
- Reverend Zombie's House-Voodoo
- Rfd Postal Museum
- Rhodes Hall
- Rhythm & Blues Hall Of Fame
- Richard W Bock Sculpture Musem
- Richard W Bock Sculpture Musem
- Richard W Bock Sculpture Musem
- Richland Heritage Museum
- Richmond Art Museum
- Richmond Hill Historical
- Riley County Historical Museum
- Riley Home Museum
- Riley House Museum
- Ripley's Believe It Or Not
- Ritz Theatre & Lavilla Museum
- River Heritage Museum
- River Music Experience Museum
- River Road Museum
- Riverfront Museum Park
- Riverview At Hobson Grove
- Robert C Williams American
- Rock Island County Historical
- Rock Island County Historical
- Rockcastle Cty Historical Cbns
- Rolling Hills Wildlife Advntr
- Rolscreen Museum
- Rome Area History Museum
- Ronald Reagan Museum
- Ronald Reagan Museum
- Roniger Memorial Museum
- Rooks County Historical Museum
- Roselawn Museum
- Round Barn Farm Museum
- Round Barn Farm Museum
- Route 66 Dream Car Museum
- Royellou Museum
- Rubell Family Collection
- Rural Life Museum
- Rush County Historical Society
- Russell Museum Oilpatch
- Russell Rensselaer House Msm
- Ruthmere Museum
- Safety Harbor Museum
- Salina Art Ctr
- Saline County Area Museum
- Salisbury House
- San Luis Archaeological Site
- Sanford Museum
- Sanford Museum & Planetarium
- Santa Fe Trail Ctr
- Santa Fe Trail Museum
- Savannah History Museum
- Savannah Ogeechee Canal Soc
- Savannah Science Museum
- Scarborough Historical Society
- Schacknow Museum Of Fine Arts
- Schaff Truck & Tractor Museum
- Schaff Truck & Tractor Museum
- Schepis Museum
- Schepis Museum
- Schield International Museum
- Schmidt Museum Business Ofc
- Schmidt Museum Of Coca-Cola
- Scholte House
- Schoolhouse Childrens Museum
- Schuyler Jail Museum
- Schuyler Jail Museum
- Schuyler Museum
- Science Center
- Science Center Of Iowa
- Science Center-Iowa Preschool
- Science Center-Pinellas County
- Science Central
- Science Station & Imax Theatre
- Scitech Hands On Museum
- Scott County Heritage Ctr
- Seabrook Village
- Seal Cove Auto Museum
- Seashore Trolley Museum
- Sebastian Area Historical
- Seelye Mansion
- Selby Botanical Gardens
- Selby Gallery
- Seminole County Hist Museum
- Seminole Valley Farm Inc
- Seven Springs Historical Scty
- Shadows On The Teche
- Shaker Museum At South Union
- Shawnee Indian Mission
- Sheets Wildlife Museum
- Sheffield Historical Society
- Sheffield Historical Society
- Sheffield Historical Society
- Shelby County Historical
- Shelby County Museum
- Shenandoah Historical Museum
- Ships Of The Sea Maritime Msm
- Shoshone Bannock Tribal Museum
- Showme Inc
- Sideshow Museum
- Silver River Museum & Enviro
- Simpkins War Museum
- Sixth Cavalry Museum
- Skillman Museum Speed Shop
- Skinner House Cmnty Ctr & Musm
- Skinner House Cmnty Ctr & Musm
- Skowhegan History House
- Smallwood Trading Post
- Smoky Hill Museum
- Snake River Heritage Ctr
- Snite Museum Of Art
- Snyder Memorial Museum & Arts
- Souders Historical Farm Museum
- South Amana Barn Museum
- South Bend Regional Museum-Art
- South Florida Museum
- South Florida Railway Museum
- South Florida Sci Museum Edu
- Southard CHTJ House Museum
- Southdown Plantation House
- Southeastern Museum Conference
- Southeastern Railway Museum
- Southern & Locomotive History
- Southern Aroostook Museum
- Southern Forest Heritage Msm
- Southwest Florida Historical
- Southwest Florida Holocaust
- Spady Museum
- Spanish Quarter Museum
- Sparta Hancock Museum
- Speed Art Museum
- Spencer Museum Of Art-Ku
- Sports Humanitarian Hall-Fame
- Sports Immortals Museum
- Spring Street Museum
- Springfield Chilren's Museum
- Squirel Cage Jail
- St Augustine Lighthouse & Msm
- St Clair County Historical Soc
- St Clair County Historical Soc
- St Clair County Historical Soc
- St Clair County Historical Soc
- St Gertrude's Museum
- St John Science Museum
- St Louis Aviation Museum
- St Louis Aviation Museum
- St Lucie County Museum Div
- St Mary Parish Museum
- St Marys City Museum
- St Marys Submarine Museum Inc
- St Petersburg Museum-History
- Stacyville Memory Museum
- Staff House Museum
- Stafford County Historical
- Stanley Museum
- Stanley Museum
- Stanton County Museum
- Starke County Museum
- State Museum
- State Museum
