Maršoniškės is a village in Zarasai District Municipality, in Utena County, Lithuania. Maršoniškės lies at 163 m above sea level. The nearest city is Utena, 44 km to the southwest. Among the landmarks around are Daugavpils fortress (27 km), Ss. Boris and Gleb Cathedral (29 km) and Church of the Immaculate Conception of Blessed Virgin Mary in Daugavpils (29 km). Among the natural features are Stelmužė Oak (9.9 km) and Egļukalns (18.0 km).