Stadttheater Minden is a municipal theatre in Minden, North Rhine-Westphalia, Germany. The theatre has no ensemble, but stages some productions of its own. It became known for a Wagner project culminating in Der Ring in Minden.

Der Ring in Minden was a project to stage Richard Wagner's cycle Der Ring des Nibelungen at the Stadttheater Minden, beginning in 2015 with Das Rheingold, followed by the other parts in the succeeding years, and culminating with the complete cycle performed twice in 2019. The stage director was Gerd Heinz, and Frank Beermann conducted the Nordwestdeutsche Philharmonie, playing on the stage of the small theatre. The singers acted in front of the orchestra, making an intimate approach to the dramatic situations possible. The project received international recognition and was compared favourably to the Bayreuth Festival.