R
Ilan Ramon (1954–2003) — STS-107. Died on the Columbia.
William Readdy — STS-42, STS-51, STS-79
Kenneth Reightler — STS-48, STS-60
James F. Reilly — STS-89, STS-104, STS-117
Garrett Reisman — STS-123/124, STS-132
Thomas Reiter — Soyuz TM-22, STS-121/116
Vladimír Remek — Soyuz 28
Judith Resnik (1949–1986) — STS-41D. Died on the Challenger (STS-51L)
Sergei Revin — Soyuz TMA-04M
Paul W. Richards — STS-102
Richard N. Richards — STS-28, STS-41, STS-50, STS-64
Sally Ride (1951-2012) — STS-7, STS-41-G
Patricia Robertson, M.D. (1963–2001) — No flights.
Stephen Robinson — STS-85, STS-95, STS-114, STS-130
Russell L. Rogers (1928–1967) — No flights. Assigned to the Dyna Soar project.
Roman Romanenko — Soyuz TMA-15
Yuri Romanenko — Soyuz 26/27, Soyuz 38, Soyuz TM-2/3
Kent Rominger — STS-73, STS-80, STS-85, STS-96, STS-100
Stuart Roosa (1933–1994) — Apollo 14
Jerry L. Ross — STS-61-B, STS-27, STS-37, STS-55, STS-74, STS-88, STS-110
Valery Rozhdestvensky — Soyuz 23
Nikolay Rukavishnikov (1932–2002) — Soyuz 10, Soyuz 16, Soyuz 33
Mario Runco, Jr. — STS-44, STS-54, STS-77
Valery Ryumin — Soyuz 25, Soyuz 32/34, Soyuz 35/37, STS-91Read more about this topic: List Of Astronauts By Name