Olympia School (Martin County, Florida)
Omaha High School (Douglas County, Nebraska)
Omro High School, Annex and Webster Manual Training School (Winnebago County, Wisconsin)
Former school complex repurposed as assisted living for senior citizens
Oneida Stake Academy (Franklin County, Idaho)
Oquirrh School (Salt Lake County, Utah)
Oran District No. 22 Schoolhouse (Onondaga County, New York)
Orange City Colored School (Volusia County, Florida)
Orange High School (Orange County, Virginia)
Orange Park Elementary School (Clay County, Florida)
Orange Street School (Cumberland County, North Carolina)
Orange Union High School (Orange County, California)
Orchard House (Middlesex County, Massachusetts)
Oregon High School (Dane County, Wisconsin)
Oronoco School (Olmsted County, Minnesota)
Orr School (Miller County, Arkansas)
Orville Beach Memorial Manual Training School (Winnebago County, Wisconsin)
Former school repurposed as business center and office building
Osage Hills School (St. Louis County, Missouri)
Osborn Street School (Bristol County, Massachusetts)
Osborne School (Palm Beach County, Florida)
Osborne School (Erie County, Ohio)
Oscar W. Underwood House (Washington, District of Columbia)
Osceola Public School Building (St. Clair County, Missouri)
Osprey School (Sarasota County, Florida)
Ouachita Parish High School (Ouachita Parish, Louisiana)
Our Lady of Mercy High School (Hamilton County, Ohio)
Our Lady of the Angels Academy (Morrison County, Minnesota)
Our Lady of the Angels School (Bernalillo County, New Mexico)
Our Lady of the Assumption School (Lafayette Parish, Louisiana)
Our Lady of Victory Academy (Tarrant County, Texas)
Our Mother of Mercy School (Tarrant County, Texas)
Ourant's School (Harrison County, Ohio)
Out of Door School (Sarasota County, Florida)
Overackers Corners Schoolhouse (Yates County, New York)
Overbrook High School (Philadelphia County, Pennsylvania)
Overbrook School (Philadelphia County, Pennsylvania)
Overstreet Hall (Columbia County, Arkansas)
Overton Gymnasium (Clark County, Nevada)
Owen High School (Clark County, Wisconsin)
Oxford Female Institute (Butler County, Ohio)
P. K. Yonge Laboratory School, Old (Alachua County, Florida)
P. S. Dupont High School (New Castle County, Delaware)
Pahokee High School (Palm Beach County, Florida)
Paia School (Maui County, Hawaii)
Paint Lick School (Garrard County, Kentucky)
Paintsville High School (Johnson County, Kentucky)
Palestine High School (Anderson County, Texas)
Palmer Fire School (Mecklenburg County, North Carolina)
Palmer Hall (El Paso County, Colorado)
Palmer School (Essex County, Massachusetts)
Panola High School and Gymnasium (Latimer County, Oklahoma)
Pantego Academy (Beaufort County, North Carolina)
Panther Branch School (Wake County, North Carolina)
Paradise School (Newport County, Rhode Island)
Parents' and Children's Schoolhouse (Midland County, Michigan)
Paris Male Academy (Monroe County, Missouri)
Paris Public School (Bear Lake County, Idaho)
Park Addition School (Laramie County, Wyoming)
Park City High School (Summit County, Utah)
Park City Junior High School (Knox County, Tennessee)
Park Elementary School (Clay County, Minnesota)
Park House Hotel (Johnson County, Iowa)
Park Place School (Allegheny County, Pennsylvania)
Park Region Luther College (Otter Tail County, Minnesota)
Park School (Douglas County, Nebraska)
Parker High School Auditorium (Greenville County, South Carolina)
Parker School (Polk County, Oregon)
Parkesburg School (Chester County, Pennsylvania)
Parkland Junior High School (Jefferson County, Kentucky)
Parks School (Scott County, Arkansas)
Parkside Elementary School (Kay County, Oklahoma)
Parmenter Memorial Hall (Douglas County, Kansas)
Parnell Hall (Pulaski County, Arkansas)
Parsonsfield Seminary (York County, Maine)
Pascagoula High School, Old (Jackson County, Mississippi)
Pascoag Grammar School (Providence County, Rhode Island)
Pass Creek School (Gallatin County, Montana)
Pataskala Elementary School (Licking County, Ohio)
Patten Consolidated School (Aurora County, South Dakota)
Patterson Branch Library (Stanislaus County, California)
Paul Hall, Muskingum College (Muskingum County, Ohio)
Paul Lawrence Dunbar School (Philadelphia County, Pennsylvania)
Paul Lawrence Dunbar School (Lee County, Florida)
Paw Paw Building (Cecil County, Maryland)
Pawtucket West High School (Providence County, Rhode Island)
Paxton First Schoolhouse (Ford County, Illinois)
Pea Ridge School Building (Marion County, Arkansas)
Peabody College for Teachers (Davidson County, Tennessee)
Peabody Elementary School (Shelby County, Tennessee)
Peabody Hall (Alachua County, Florida)
Peabody High School (Gibson County, Tennessee)
Peabody School (Dodge County, Georgia)
Peabody School (Essex County, Massachusetts)
Peace College Main Building (Wake County, North Carolina)
Peake High School (Clark County, Arkansas)
Pearl High School (Davidson County, Tennessee)
Pearl Street School (Middlesex County, Massachusetts)
Pearl Street Schoolhouse (Ulster County, New York)
Pease Auditorium (Washtenaw County, Michigan)
Pecan Creek School (Gillespie County, Texas)
Pecan Grove School (Cape Girardeau County, Missouri)
Peeples Valley School (Yavapai County, Arizona)
Peirce School (Middlesex County, Massachusetts)
Pembroke High School, Former (Robeson County, North Carolina)
Penn Treaty Junior High School (Philadelphia County, Pennsylvania)
Pennell Institute (Cumberland County, Maine)
Pennsylvania Institute for the Deaf and Dumb (Philadelphia County, Pennsylvania)
Pentacrest (Johnson County, Iowa)
Peoria Indian School (Ottawa County, Oklahoma)
Percy District School House, (Former) (Sagadahoc County, Maine)
Perkins Hall of Administration (Dallas County, Texas)
Perry Estate--St. Mary's Academy (Travis County, Texas)
Perry High School (Allegheny County, Pennsylvania)
Perry School (Franklin County, North Carolina)
Perry Snell Hall (Warren County, Kentucky)
Demolished - Replaced with modern structure
Peteetneet School (Utah County, Utah)
Peterboro Street Elementary School (Madison County, New York)
Pettigrew School (Madison County, Arkansas)
Phelps Library, Shattuck School (Rice County, Minnesota)
Philadelphia High School for Girls (Philadelphia County, Pennsylvania)
Philadelphia School of Design for Women (Philadelphia County, Pennsylvania)
Philadelphia School of Occupational Therapy (Philadelphia County, Pennsylvania)
Philanthropic Hall, Davidson College (Mecklenburg County, North Carolina)
Philip H. Sheridan School (Philadelphia County, Pennsylvania)
Philipsburg Grade School (Granite County, Montana)
Phillips High School (Price County, Wisconsin)
Phillips School (Winn Parish, Louisiana)
Philomath College (Benton County, Oregon)
Phoenix Union Colored High School (Maricopa County, Arizona)
Physical Education Building/La Crosse State Normal School (La Crosse County, Wisconsin)
Former physical education building about to undergo major remodeling and repurposing
Pickaway Rural Historic District (Monroe County, West Virginia)
Piedmont College (Habersham County, Georgia)
Christian college in Demorest, GA
Pierce Park School (Ada County, Idaho)
Pierce School No. 13 (Scott County, Iowa)
Pike-Fletcher-Terry House (Pulaski County, Arkansas)
Pikeville College Academy Building (Pike County, Kentucky)
Pilgrim Hot Springs (Nome Census Area, Alaska)
Pine Bluffs High School (Laramie County, Wyoming)
Pine Butte School (Gallatin County, Montana)
Pine Grove Community Club (Edgar County, Illinois)
Pine Grove Rosenwald School (Richland County, South Carolina)
Pine Mountain Settlement School (Harlan County, Kentucky)
Pine Ridge School Building (Izard County, Arkansas)
Pine Street School (Franklin County, Massachusetts)
Pine Street School (Shasta County, California)
Pine Street School (Bristol County, Massachusetts)
Pine Street School (Spartanburg County, South Carolina)
Pinedale Elementary School (Navajo County, Arizona)
Pinkerton Hall (Woodford County, Kentucky)
Pioneer Gothic Church (Livingston County, Illinois)
Pioneer Hall (Cumberland County, Tennessee)
Pioneer Hall, Linfield College (Yamhill County, Oregon)
Pioneer School (Park County, Wyoming)
Pioneer School House (Anchorage, Alaska)
Pipe Line School (Mesa County, Colorado)
Pipe School (Portage County, Wisconsin)
Typical wood frame, one room schoolhouse with tin ceiling
Piqua High School (Miami County, Ohio)
Pisek School (Walsh County, North Dakota)
Pittsburg School and Gymnasium (Pittsburg County, Oklahoma)
Pittsfield East School (Pike County, Illinois)
Plain View School (Franklin County, Georgia)
Abandoned schoolhouse near Carnesville, GA
Plaisance School (St. Landry Parish, Louisiana)
Plana School (Brown County, South Dakota)
Plant City High School (Hillsborough County, Florida)
Plaquemine High School (Iberville Parish, Louisiana)
Playmakers Theatre (Orange County, North Carolina)
Plays and Players (Philadelphia County, Pennsylvania)
Pleasant Grove School (Utah County, Utah)
Pleasant Grove School (Peoria County, Illinois)
Pleasant Hill Consolidated School (Georgetown County, South Carolina)
Pleasant Hill School (Cass County, Texas)
Pleasant Hill School (Wayne County, Iowa)
Pleasant Plains School (Hertford County, North Carolina)
Pleasant Retreat Academy (Lincoln County, North Carolina)
Pleasant Ridge School (Buchanan County, Missouri)
Pleasant Street School (Middlesex County, Massachusetts)
Pleasant Street School (Worcester County, Massachusetts)
Pleasant Valley School (Larimer County, Colorado)
Pleasant Valley School (Las Animas County, Colorado)
Pleasant Valley School (Payne County, Oklahoma)
Pleasant Valley School (Twin Falls County, Idaho)
Pleasant Valley School District #2 (Franklin County, Kansas)
Pleasant View School (Twin Falls County, Idaho)
Pleasant View School (Johnson County, Missouri)
Pleasant View School II (Kootenai County, Idaho)
Plum Grove School (Linn County, Missouri)