St. Michael, Roman Catholic church in Siegen, Germany.

St. Michael is a Historicist church on the lower west slope of the Giersberg, north of Siegen's old town. Its light grey stone body carries dark slate roofs, two 57-metre towers with steep spires and a clock face, a long pitched roof to the left, a small round apse and a short octagonal crossing tower. Inside, it follows a three-nave Romanesque basilica layout.

Construction took place between 1903 and 1906 under the direction of Dortmund architect Johannes Franziskus Klomp. The consecration occurred on January 7, 1906, marking the completion of this building phase.

The baptismal chapel holds a war memorial by Munich sculptor Karl Baur, inaugurated in autumn 1922. The interior was designed by church painter A. W. Ballin, and a Christ painting by Bernd Terhorst hangs on the choir wall. The crypt, restored from the late 1970s to the early 1980s, regained use for services and holds its own organ.

The church stands on the lower west slope of the Giersberg, north of the old town and opposite the Marienkrankenhaus. The main entrance faces the slope, with the two 57-metre towers on the right of the facade. The site is reached on foot via the Giersberg path; the slope is steep, so allow extra time.

The main organ was built in 1912 by Anton Feith of Paderborn, tested and accepted on 6 April 1922, rebuilt in 1971 and overhauled in 2000 by Siegfried Sauer; its disposition was extended in 2002. The crypt organ by Mebold of Siegen-Breitenbach was consecrated in autumn 1983.