Breimsvatn or Breimsvatnet is a lake in the municipalities of Gloppen and Sunnfjord in Vestland county, Norway.

The European route E39 highway runs along the north end of the lake, connecting the two nearby areas of Sandane and Byrkjelo.

On the shores of the 17-kilometre (11 mi) long lake lie several villages including Re and Kandal.

Historically, the area surrounding the lake was part of the municipality of Breim, which existed from 1886 until 1964.

This Vestland location article is a stub.