Catherine Grèze (born 1960) is a French politician and Member of the European Parliament elected in the 2009 European election for the South-West France constituency.
She is a member of The Greens in the Midi-Pyrénées region since 1985 and participate in the Global Greens organization.
In the 2009 European elections, she was the second candidate on the Europe Écologie list in the South-West region, behind José Bové, and was elected to the European Parliament due to the list's surprisingly high 15.82% of the vote in the constituency. She signed the Spinelli Group Manifesto in favour of a Federal Europe.