| Pacific Springs, stopping place on the Oregon Trail | WyoHistory.org |
| Paleon Museum | |
| Palette Ranch and Jack Creek Trailhead | |
| Parco (Sinclair) historic district | |
| Parco Museum | |
| Park County Archives | |
| Park County Fair | |
| Park County, Wyoming | Lynn Johnson Houze |
| Parker, J. P. and Martin Ringo, Oregon Trail graves of | WyoHistory.org |
| Parkitecture, Wyoming | John Clayton |
| Parrott, Big Nose George | Lori Van Pelt |
| Parting of the Ways | WyoHistory.org |
| Parting of the Ways | |
| Pathfinder Dam | |
| Pathfinder Dam | The National Park Service |
| Paul, Elizabeth, pioneer grave of | Randy Brown |
| Payton, E. T., journalist and mental patient | Rebecca Hein |
| PBS, Wyoming | Doug McInnis |
| Pedro II, emperor of Brazil, crosses Wyoming, 1876 | Phil Roberts |
| Pedro Mountain Mummy, The | Rebecca Hein |
| Penney, J. C. | Doug McInnis |
| Permanent Wyoming Mineral Trust Fund | Sarah Gorin |
| Petersen, Carol, Cokeville bombing oral history | Wyoming State Archives |
| Philharmonic Orchestra of Casper | Rebecca Hein |
| Philippines, Wyoming Troops in 1898 | Douglas R. Cubbison |
| Pictographs and Petroglyphs | Tom Rea |
| Pictographs near Outlaw Canyon | |
| Piedmont Charcoal Kilns | |
| Piedmont Charcoal Kilns | WyomingHeritage.org, Wyoming State Historic Preservation Office |
| Pinedale Anticline and Jonah Field | |
| Pinedale Anticline development | Ann Chambers Noble |
| Pinedale, Wyoming | Ann Chambers Noble |
| Pipelines in Wyoming, a Historical Overview | Tom Mast |
| Pitchfork Ranch | Brian Beauvais |
| Platte Bridge Station, Battle of | Ellis Hein |
| Platte County, Wyoming | Nicole Lebsack |
