Eugene Cernan
The Apollo 10 crew (Thomas Stafford, John W. Young and Eugene Cernan) achieved the highest speed relative to Earth ever attained by humans: 39,897 kilometers per hour (11.082 kilometers per second or 24,791 miles per hour, approximately 32 times the speed of sound and 0.0037% of the speed of light). The record was set 26 May 1969.