Grundsund (Swedish pronunciation: [ˈɡrɵ̂nːdsɵnd])[2] is a locality situated in Lysekil Municipality, Västra Götaland County, Sweden.

It has lineage back to at least the 17th century as a fishing village, but it wasn't until the great herring periods that settlement increased.

It was never turned into a seaside resort or shipowner in the same way as Fiskebäckskil, instead the 20th century brought certain industry establishments, like raincoat production and canneries.

The new building was erected in 1988 with support from Boverket, after the old association compound from 1925 and 1952 was torn down.The TV series Saltön is mostly recorded in Grundsund.

Many locations can be recognized from the series, Pelles Rökeri for example was used a lot for the scenes taking place at the fictional restaurant "Lilla Hunden" (Little Dog).