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.
Kathleen Rubins
Kathleen Hallisey "Kate" Rubins (born October 14, 1978) is a NASA astronaut. She became the 60th woman to fly in space when she launched on a Soyuz spacecraft to the International Space Station on July 6, 2016. She returned to Earth on October 30, 2016 aboard a Soyuz. She was a crew member of Expedition 48 and Expedition 49 of the International Space Station.