Regau is a municipality in the Austrian state of Upper Austria near Vöcklabruck, which is the capital of the district.

Another important body of water is the Baggersee, an artificial lake where many people like to stay in summer for swimming or other sports.

The municipality is composed of 36 smaller villages of which Schalchham with more than 1000 inhabitants is the largest.

The origin of the name Regau was the Latin Repagauve; later, this became Rebengau in German.

Over time, this name was shortened and nowadays the municipality is called Regau.