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.
He played college tennis at Ole Miss.
Sandkaulen won one ATP Challenger doubles title at the 2023 Tennis Open Karlsruhe with Neil Oberleitner.