Texas - Area of significance: Architecture
| Orgain, Sarah Jane, House |
| Oriental Textile Mill |
| Original Town Residential Historic District |
| Ott, Charles J. and Alvina, House |
| Otto House |
| Ott, S. I., House |
| Our Lady of Lourdes Church |
| Our Lady of Mount Carmel and St. Therese Church |
| Our Lady of Victory Academy |
| Our Mother of Mercy Catholic Church and Parsonage |
| Oxsheer, Fountain G. and Mary, House |
| Page-Gilbert House |
| Page, Paul D., House |
| Paggi, Michael, House |
| Paige-DeCrow-Weir House |
| Paillet House |
| Palace Hotel |
| Palace Theatre |
| Palestine Carnegie Library |
| Palestine High School |
| Palestine New Town Commercial Historic District |
| Palmer, Edward Albert, Memorial Chapel and Autry House |
| Palo Pinto County Courthouse |
| Palo Pinto County Jail |
| Pampa City Hall |
| Pampell-Day House |
| Pan-American Courts and Cafe |
| Panhandle Inn |
| Panna Maria Historic District |
| Panola County Jail |
| Panther Junction Mission 66 Historic District |
| Pape-Borchers Homestead |
| Paramount Theater |
| Paramount Theatre |
| Paris Commercial Historic District |
| Parker-Bradshaw House |
| Parker-Browne Company Building |
| Parker County Courthouse |
| Parker, James F. and Susie R., House |
| Parker, John W., House |
| Parker Lumber Company Complex |
| Parker, Milton, House |
| Park Hotel |
| Parmer County Courthouse |
| Parramore, D. D., House |
| Parramore Historic District |
| Partee, Hiram, House |
| Pasadena Post Office |
| P. A. Smith Hotel |
| Patrick, Marshall T., House |
| Patrick, Woodson and Margaret, House |
| Patterson, Stanley, Hall |
| Paul Building |
| Payne, M. S., House |
| Peak's Suburban Addition Historic District |
| Pearcy, J. H., House |
| Peck, Capt. Barton, House |
| Peden, D. D., House |
| Pederson, John, Farm |
| Pegues House |
| Pela House |
| People's National Bank Building |
| Percy, Dr. Edward-Abney House |
| Perkins Hall of Administration |
| Perkins, James I. and Myrta Blake, House |
| Perkins, Joe and Lois, House |
| Perry, A. F. and Myrtle-Pitmann House |
| Perry, Capt. William, House |
| Perry, C. W. Archie-Hallmark House |
| Perry, Edgar H. Jr., House |
| Perry Estate-St. Mary's Academy |
| Perry-Swilley House |
| Peterson, George A., House |
| Petroleum Building |
| Petroleum Building |
| Petroleum Building |
| Pettey House |
| Phillips and Trosper Buildings |
| Phillips, E. F., House |
| Phillips, Judge Alexander H., House |
| Pickering House |
| Pierson, Ole and Ann, Farm |
| Pilot Point Commercial Historic District |
| Pine Bluff-Fitzhugh Historic District |
| Pines Theatre |
| Pippert House |
| Pittsburg Commercial Historic District |
| Pix Building |
| Plainview Commercial Historic District |
| Plainview Hardware Company Building |
| Plano Downtown Historic District |
| Planters Bank Building |
| Plaza Hotel |
| Plaza Theater |
| Plaza Theatre |
| Pleasant Hill School |
| Pledger, J. W., House |
| Plehwe Complex |
| Plemons-Mrs. M. D. Oliver-Eakle Additions Historic District |
| Plumhoff House |
Data from United States Park Service and Wikidata
