text: Lee Harvey Oswald – accused assassin of U.S. President John F. Kennedy
  Hugh O'Brian – Golden Globe-winning and Emmy Award-nominated actor (The Life and Legend of Wyatt Earp)
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  Ralph Parcaut – professional wrestler, Middleweight Champion of the World
  Fess Parker – Emmy-nominated film and TV actor
  Bob Parsons – founder and CEO of GoDaddy.com
  Pat Paulsen – Emmy Award-winning actor, comedian and satirist (The Smothers Brothers Show, Night Patrol)
  Sam Peckinpah – Oscar-nominated filmmaker of The Wild Bunch and Straw Dogs
  Paul Pender – Middleweight Boxing Champion
  Jack Pennick – actor (Mister Roberts, The Searchers, The Man Who Shot Liberty Valance)
  George Peppard – BAFTA Award-nominated actor (Breakfast at Tiffany's)
  Jack Perkins – actor (What's Up, Doc?, Nickelodeon)
  Andy Phillip – Basketball Hall of Famer
  Bum Phillips – NFL head coach
  Charles Phillips – businessman, president of Oracle Corporation
  Robert Phillips – actor and professional football player for the Washington Redskins (The Killers, The Dirty Dozen, Walking Tall: Final Chapter)
  Sidney Phillips – author of You'll be Sor-ree, basis in part for Ken Burns' World War II documentary, The War (2007), and later portrayed in the HBO miniseries The Pacific (2010)
  Tony Poe – CIA paramilitary officer during the Vietnam War