Erfjord is a population centre in Suldal municipality. It is home to 500–600 people and comprises Erøy, Bog, Bogsund, Hålandsosen and Håland. There are two shops in Erfjord, a church, school and daycare centre. The National Tourist Route Ryfylke passes Erfjord.

Hålandselva is a river that meets the fjord at Hålandsosen. When the waters run high enough, salmon swim upstream to spawn.

Hålandstunet farmstead, a part of Ryfylke Museum, is situated in Erfjord.
In early August every year, the Erfjord Festival is held at Hålandsosen.