Until 1 January 2007, Grenaa municipality or Grenå municipality was a municipality (Danish, kommune) in Aarhus County on the east coast of the Jutland peninsula in central Denmark.
The municipality covered an area of 196 km2, and had a total population of 18,641 (2005).
Its last mayor was Gert Schou, a member of the Social Democrats (Socialdemokraterne) political party.
The municipality was located on the east coast of the peninsula known as Djursland, with the waters of the Kattegat to the east, defining the municipality's eastern border.
This created a municipality with an area of 661 km2 and a total population of 34,382 (2005).