Tim Sandkaulen (born 29 December 1997) is a retired German tennis player who specialized in doubles.

Sandkaulen had a career high ATP doubles ranking of world No.

172, achieved on 25 September 2023.

[1] He played college tennis at Ole Miss.

[2] Sandkaulen won one ATP Challenger doubles title at the 2023 Tennis Open Karlsruhe with Neil Oberleitner.