Sabine Krein-Auer (born 2 October 1966) is a German former professional tennis player.

Born in Radolfzell, Auer competed on the professional tour in the 1980 and 1990s, reaching a best singles ranking of 125 in the world.

Auer's best performance on the WTA Tour was making the fourth round of the 1988 Lipton International Players Championships.

Playing in the main draw as a qualifier, she defeated Iwona Kuczyńska, Amy Frazier and world number seven Hana Mandlíková, before being eliminated by Barbara Potter.

Now living in Saarland, Auer still plays tennis competitively on the ITF senior's circuit.