PT1

PT1 may refer to:
 * 486958 Arrokoth (New Horizons PT1), a Kuiper belt object and selected target for a flyby of the New Horizons probe
 * Pratt & Whitney PT1, a free-piston gas-turbine engine
 * Consolidated PT-1 Trusty, a 1930s USAAS primary trainer airplane
 * Piper PT-1, primary trainer airplane.
 * PT-1, a pre-World War II US Navy PT boat
 * Prison Tycoon, a 2005 video game
 * PT1, a paratriathlon classification