Bolgenach
Bolgenach denotes:
- Bolgenach (Weiler Ach) , left upper course of the hamlet Ach opposite Obermaiselstein , Oberallgäu district, Bavaria
- Bolgenach (Weißach) , left tributary of the Weißach near Sulzberg, Bregenz district, Vorarlberg; with upper reaches in Bavaria
- Bolgenach (municipality of Hittisau) , hamlet and cadastral municipality of Hittisau , Bregenz district, Vorarlberg
