Sandarne is a locality in Söderhamn Municipality, in Gävleborg County, Sweden. Sandarne lies at 1 m above sea level. It has 1,844 inhabitants (2023). The nearest city is Gävle, 65 km to the south. Among the landmarks around are Faxeholm (6.5 km), Ulrika Eleonora kyrka, Söderhamn (7.1 km) and Söderala church (10.5 km).
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