Ruhnu Airfield (ICAO: EERU) is an airfield on Ruhnu island in Estonia. The airfield is situated to the south of the island, 37 nautical miles (69 km; 43 mi) southeast of Kuressaare, near the village of Ringsu. It is owned by the same company as Kuressaare Airport, located 70km further north, on Saaremaa island.

In 2024 the Estonian Ministry of Regional Affairs stated that scheduled flights to Ruhnu will be discontinued when a year-round ferry service starts with a new ice class vessel.