Gárgu is a village in Alta Municipality, in Finnmark, Norway. Gárgu lies at 1 m above sea level, in the Porsanger Peninsula mountains, on the Porsanger Peninsula peninsula. The nearest city is Tromsø, 181 km to the west. Among the landmarks around are Komagfjord Church (3.9 km), Elvebakken Church (28 km) and Leirbotn Church (12.0 km).

Also written Nyvoll.