Names
- O'Neill, Tip1
- Oba, Dayna1
- Obama, Barack2
- Ohata, Robert1
- Osage Tribe, Oklahoma2
- Osborne, T. M.1
- Pancoast, J. Arthur1
- Patterson, Robert Porter, 1891-19521
- Pawnee Indian Tribe of Oklahoma1
- Pell, Claiborne, 1918-20091
- Pellegrino, Shelley, J.1
- Perkins, Milo, 1900-19721
- Petersen, Howard C. (Howard Charles), 1910-19951
- Pitts, Lewis, 1947-1
- Principi, Anthony Joseph, 1944-1
- Quayle, Dan, 1947-4
- Randolph, A. Philip (Asa Philip), 1889-19791
- Rasco, Carol H. (Carol Hampton), 1948-1
- Ravnholt, Eiler3
- Reagan, Ronald9
