Reykjafoss is a small waterfall in the river Varmá, in the small village of Hveragerði, Suðvesturland, Iceland.
The waterfall is easy to reach from the bridge over the river Varmá in Hveragerði. There is a small road following the river until you reach Reykjafoss.
The river Varmá plunges down over 3 meter and is appr. 15 meter wide.