Jonskär is a settlement in Söderhamn Municipality, in Gävleborg County, Sweden. It has 96 inhabitants. The nearest city is Gävle, 74 km to the south. Beaches nearby: Långvind (8.6 km). Among the landmarks around are Faxeholm (6.1 km), Ulrika Eleonora kyrka, Söderhamn (7.3 km) and Söderala church (12.9 km).