Onarheim is a village in Tysnes municipality in Vestland county, Norway.

The village is located on the southeastern shores of the island of Tysnesøya, along the Hardangerfjorden.

The village has been home to a church since the 12th century.

The present Onarheim Church was built in 1893, and it serves the southeastern part of the municipality.

This Vestland location article is a stub.