Astronaut
The first civilian in space was Valentina Tereshkova aboard Vostok 6 (she also became the first woman in space on that mission).
Tereshkova was only honorarily inducted into the USSR's Air Force, which did not accept female pilots at that time. A month later, Joseph Albert Walker became the first American civilian in space when his X-15 Flight 90 crossed the line, qualifying him by the international definition of spaceflight. Walker had joined the US Army Air Force but was not a member during his flight. 
The first people in space who had never been a member of any country's armed forces were both Konstantin Feoktistov and Boris Yegorov aboard Voskhod 1.
Nichelle Nichols
The program was a success. Among those recruited were Dr. Sally Ride, the first American female astronaut, and United States Air Force Colonel Guion Bluford, the first African-American astronaut, as well as Dr. Judith Resnik and Dr. Ronald McNair, who both flew successful missions during the Space Shuttle program before their deaths in the Space Shuttle "Challenger" disaster on January 28, 1986. Recruits also included Charles Bolden, the former NASA administrator and veteran of four shuttle missions, Frederick D. Gregory, former deputy administrator and a veteran of three shuttle missions and Lori Garver, former deputy administrator. An enthusiastic advocate of space exploration, Nichols has served since the mid-1980s on the board of governors of the National Space Society, a nonprofit, educational space advocacy organization founded by Dr. Wernher von Braun.