Astronauts 11 / 15
Ravish Malhotra (1943)
Reinhard Furrer (1940)
Reinhold Ewald (1956)
Rex J. Walheim (1962)
Richard A. Searfoss (1956)
Richard E. Lawyer (1932)
Richard Garriott (1961)
Richard H. Truly (1937)
Richard Hieb (1955)
Richard M. Linnehan (1957)
Richard Mastracchio (1960)
Richard N. Richards (1946)
Richard O. Covey (1946)
Richard R. Arnold (1963)
Rick Husband (1957)
Robert A. Parker (1936)
Robert A. Rushworth (1924)
Robert C. Springer (1942)
Robert Curbeam (1962)
Robert D. Cabana (1949)
Robert F. Overmyer (1936)
Robert Henry Lawrence Jr. (1935)
Robert J. Cenker (1948)
Robert L. Behnken (1970)
Robert L. Gibson (1946)
Robert L. Stewart (1942)
Robert S. Kimbrough (1967)
Robert Satcher (1965)
Robert Thirsk (1953)
Roberta Bondar (1945)
Rodolfo Neri Vela (1952)
Roger B. Chaffee (1935)
Roger K. Crouch (1940)
Roman Romanenko (1971)
Ronald A. Parise (1951)
Ronald J. Garan Jr. (1961)
Ronald J. Grabe (1945)
Ronald McNair (1950)
Russell L. Rogers (1928)
Rusty Schweickart (1935)