Grenaa (or Grenå) is a Danish town and seaport on the east coast of the Jutlandic peninsula. Tourism, education and commerce are important sectors in the economy of Grenaa. It is the only larger town on Djursland. Grenaa is the municipal seat, and the largest town, in Norddjurs Municipality, which covers the northern half of Djursland.
Grenaa was first mentioned in 1231. It was granted the status of a market town in 1445.
Grenaa has a lingering production industry just as in most of the western world. Development of tourism and educational institutions is sought to play a larger role for Grenaa in the future. The 5 km sandy Grenaa Beach is significant for tourism, with a hinterland of summer cottages, including many rentals. Grenaa is a regional shopping centre for central-eastern Djursland, an about 40 km x 40 km peninsula, protruding into the sea, between Denmark and Sweden at the entrance to the Baltic Sea.