Sigrun Grau (née Ludwigs, then Wodars, born 7 November 1965) is an East German former middle distance athlete who was born Sigrun Ludwigs in Neu Kaliß, Mecklenburg-Vorpommern.

She started out as a 400 m hurdler in Schwerin and finished fourth at the 1981 European Junior Championships.

Now competing under the name of Wodars, she won her first national title in 1986 and placed second at the European Championships in Stuttgart, behind Nadezhda Olizarenko of the Soviet Union.

In 1987, she lost seven out of eight times to Wachtel, but the race she won was the World Championships in Rome, defeating her in a close finish.

She divorced and took part as Sigrun Grau in the 1991 World Championships and the 1992 Olympics, reaching the semi-finals both times.