Stadtpfarrkirche St. Johann, Parish church in Sigmaringen, Germany.

Stadtpfarrkirche St. Johann is a parish church built in the 18th century with a rectangular nave, narrow transept, and polygonal choir that define its layout. The structure sits at the northern edge of the old town, positioned adjacent to Sigmaringen Castle.

A Romanesque chapel originally occupied the site since 1359 before being replaced by the current baroque structure. The present church was erected between 1757 and 1760 by architects Johann Martin Ilg and Hans Jakob Stoffler.

The church holds the shrine of Saint Fidelis of Sigmaringen: beside the Fidelis altar stands a two-winged brass door with flat-relief figures on an etched pomegranate background, attributed to Hermann or Peter Vischer the Elder (1460/1480), and the shrine contains the saint's bust carved by Johann Baptist Hops in 1764. The north side chapel is dedicated to Fidelis, the south one to Saint John Nepomuk.

The church is located at the northern edge of the old town and is easily accessible from the town center. A covered walkway connects it directly to the adjacent castle, making orientation straightforward when exploring the area.

The tower holds six bronze bells: two strike the full hours and four mark the quarters. A thirteenth bell, called Fidelis, is rung by hand. On the tower's north wall are inscribed the names of Sigmaringen residents who died in the First World War.