The municipality lies in Rhenish Hesse and belongs to the Verbandsgemeinde of Alzey-Land, whose seat is in Alzey.

But it is proven, that there have been human settlements long before, as there are remainings of a Roman Villa Rustica below ground.

The municipal election held on 7 June 2009 yielded the following results:[3] Mauchenheim's current mayor is Udo Arm.

The municipality's arms might be described thus: Azure under a baldachin Or Saint Remigius as a bishop vested argent and mitred of the same garnished of the second, in his dexter hand a crozier of the second, in his sinister hand a book gules garnished of the second, at his feet an escutcheon of the second charged with the letter M of the fourth.

This is, as far as is possible, a direct translation of the German blazon (In blau unter goldenem Baldachin der heilige Remigius als Bischof in silbernem Gewand, mit goldbesetzter silberner Mitra, in der Rechten einen goldenen Krummstab, in der Linken ein goldbeschlagenes rotes Buch haltend, zu seinen Füßen ein goldener Schild, darin ein roter Majuskelbuchstabe M).