St. Leodegar, Roman Catholic church building in Gammertingen, Germany.

St. Leodegar is a Roman Catholic parish church built in 1803/04 in simplified forms, consisting of a nave with a rounded apse to the east and a west tower topped by a saddle roof between stepped gables. The flat-ceilinged interior was largely redesigned in 1968; the upper gallery holds a 1972 organ with 24 stops.

A Gothic predecessor church was to be replaced in 1775/76 with a design by Pierre Michel d'Ixnard, but the present hall church was only built in 1803/04 in simplified forms. Its west tower, essentially from the earlier building, was raised by two storeys to hold the clock and two bell frames with five bells, and covered with a saddle roof between stepped gables. In 1968 the interior was almost completely remodelled and most of the historic furnishings removed.

The parish belongs to the Archdiocese of Freiburg. Its patron, Leodegar of Autun, was a seventh-century bishop; the church's name recalls him rather than a local figure. The interior was almost completely redesigned in 1968, when most of the historic furnishings were removed, so the present arrangement of pews, altar area and organ loft dates from that period and after.

The church stands on Sigmaringer Straße in Gammertingen, with the tower and its five bells at the west end and the rounded apse facing east. The interior was largely remodelled in 1968, so the flat-ceilinged nave with its two sunburst motifs and the organ loft above the rear balcony reflect that later arrangement. Visitors enter beneath the lower balcony at the rear.

The west tower survives from the Gothic predecessor church; it was raised by two storeys to house the clock and two bell chambers with five bells, and capped with a saddle roof between stepped gables. The nave itself was only built in 1803/04, after a 1775/76 plan by Pierre Michel d'Ixnard was not carried out.