Østerholt is a village in Gjerstad Municipality, in Agder, Norway. Østerholt lies at 54 m above sea level. The nearest city is Porsgrunn/Skien, 44 km to the northeast. Beaches nearby: Sandtaket (14 km), Breibukta (15 km). Among the landmarks around are Søndeled Church (9.9 km), Gjerstad Church (6.7 km) and Risør Church (15.8 km).
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