Karel Pacner (29 March 1936 – 7 April 2021) was a Czech publicist, journalist, and writer.
Pacner was born in Janovice nad Úhlavou, Czechoslovakia. His main area of focus was space exploration. He died in Prague, aged 85. Asteroid 311119 Pacner, discovered at the Kleť Observatory was named in his memory on 16 June 2021.