Sankt Johann is an Ortsgemeinde – a municipality belonging to a Verbandsgemeinde, a kind of collective municipality – in the Mainz-Bingen district in Rhineland-Palatinate, Germany.

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

The typical Rhenish-Hessian wine village was known in the Middle Ages as Weiler Megelsheim (Weiler means “hamlet” in German) and had its first documentary mention in 1220.

The municipality's landmark is the High Gothic Evangelical Johanniskirche (Saint John's Church) with an important Oberndörfer organ from 1793.

The Sankt Johanner Jahrmarkt, a yearly market, goes back to the Middle Ages and is held on the weekend following Midsummer This Mainz-Bingen location article is a stub.