Sonja Pachta (25 April 1941 – 21 August 2024) was an Austrian tennis player.

[1] Pachta, a 19-time national singles champion, was active on tour from the 1950s through to the 1970s.

[2] From 1963 to 1975, she competed for the Austria Federation Cup team, featuring in 16 rubbers.

Her best grand slam performance was a fourth round appearance at the 1962 Wimbledon Championships, where she lost to Billie Jean Moffitt (King).

[3] Pachta died in Vienna on 21 August 2024, at the age of 83.