P
Gennady Padalka — Soyuz TM-28, Soyuz TMA-4, Soyuz TMA-14, Soyuz TMA-04M
William Pailes — STS-51-J
Scott Parazynski, M.D. — STS-66, STS-86, STS-95, STS-100, STS-120
Ronald A. Parise (1951–2008) — STS-35, STS-67
Robert Parker — STS-9, STS-35
Luca Parmitano — No flights.
Nicholas Patrick — STS-116, STS-130
Viktor Patsayev (1933–1971) — Soyuz 11. Died on reentry.
James Pawelczyk — STS-90
Julie Payette — STS-96, STS-127
Gary Payton — STS-51-C
Timothy Peake — No flights.
Philippe Perrin, EAC — STS-111
Thomas Pesquet — No flights.
Donald Peterson — STS-6
Donald Pettit — STS-113/Soyuz TMA-1, STS-126, Soyuz TMA-03M
Pham Tuan — Soyuz 37/36
John Phillips — STS-100, Soyuz TMA-6, STS-119
William Pogue — Skylab 4
Alan G. Poindexter (1961-2012) — STS-122, STS-131
Mark Polansky — STS-98, STS-116, STS-127
Alexander Poleshchuk — Soyuz TM-16
/ Valeri Polyakov, M.D. — Soyuz TM-6/7, Soyuz TM-18/20
Marcos Pontes — Soyuz TMA-8
Leonid Popov — Soyuz 35/37, Soyuz 40, Soyuz T-7/5
Pavel Popovich (1930–2009) — Vostok 4, Soyuz 14
Charles Precourt — STS-55, STS-71, STS-84, STS-91
Dumitru Prunariu — Soyuz 40Read more about this topic: List Of Astronauts By Name