
Selfoss is a town in southern Iceland, situated on the banks of the Ölfusá River in the municipality of Árborg. It is the largest settlement in southern Iceland and an important regional centre for commerce, education, transport, and public services.
The town’s development is closely connected to the crossing over the Ölfusá River. A suspension bridge was built at Selfoss in 1891, making the area an important transport link between Reykjavík and southern Iceland. The present bridge was opened in 1945. Selfoss expanded significantly during the twentieth century, with residential areas, businesses, schools, and public institutions developing around the river and the main road routes.
Today, Selfoss combines residential neighbourhoods, commercial areas, public buildings, and riverfront surroundings. It is also associated with the agricultural communities of southern Iceland and serves as a gateway to nearby areas such as Þingvellir, the Golden Circle, and the southern coast.