The market town (Markt) Gangkofen lies in the valley of the river Bina along the federal highway B 388 about 17 km (11 mi) west of Eggenfelden, 26 km (16 mi) south of Dingolfing, 40 km (25 mi) southeast of Landshut, 25 km (16 mi) north of Mühldorf and 32 km (20 mi) west of the county (district) seat, Pfarrkirchen.
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The western portions of the political municipality - the former rural towns of Dirnaich and Hölsbrunn- historically belonged to the county of Vilsbiburg (now part of the county of Landshut), thus the inhabitants of those parts tend to look to be oriented in that direction (the west) even today.