Mömbris lies in the Bavarian Lower Main (Bayerischer Untermain) in the Kahlgrund halfway between Schöllkrippen and Alzenau, which are linked by Staatsstraße (State Road) 2305, at the foot of the Vorspessart (range) with its highest elevation, the Hahnenkamm at 437 m above sea level. The river Kahl flows through Mömbris.