Grundvik is a settlement in Piteå Municipality, in Norrbotten County, Sweden. It has 69 inhabitants. The nearest city is Piteå, 5.7 km to the northeast. Beaches nearby: Räkan (8.1 km), Pite Havsbad (5.9 km). Among the landmarks around are Piteå City Church (5.8 km), Hortlax Church (3.3 km) and Öjeby Church (9.2 km).