Kaldaðarnes is an ancient farm estate in Iceland on the banks of the Ölfus river, around 8 km (5.0 mi) west of Selfoss.
Between 1754 and 1846 there was a leprosy hospital at Kaldaðarnes and during 1945 to 1948 it was the location of an rehabilitation centre for alcoholics.
During World War II, the British forces built a large military camp at Kaldaðarnes as well as an airfield which was called RAF Station Kaldadarnes.
Following a flood in Ölfus river, the military camp was closed down but the airfield remained in operation.
The airstrip continued to be used during the early years of Icelandic aviation but is now in ruins.