St. Maria-St. Vicelin, Catholic church in Neumünster, Germany.

St. Maria-St. Vicelin is a three-nave Catholic parish church in Neumünster, built in neo-Romanesque style and consecrated on 24 December 1893. It was designed by architect Emil Brettschneider of Hamburg-Eimsbüttel from a plan by Osnabrück cathedral master builder Alexander Behnes, and erected by the Neumünster firm Rud. Pries. Inside, the choir holds three windows by Frans Griesenbrock showing the Nativity, the Resurrection and Pentecost.

The church was built in 1893 to serve the growing Catholic community in Neumünster. It marks a turning point when Catholic presence became more established in this predominantly Protestant region.

The double dedication to Mary and Vicelin dates from the 1893 consecration. After 1966 documents shortened the name to "St. Vicelin", causing confusion with the Protestant Vicelinkirche; since the mid-1990s the full name is used again. Since 12 May 2019 the church has served the new parish Seliger Eduard Müller.

The church is an active parish, so visits are best arranged outside Mass times. The 1993–1995 renovation restored the central aisle and column capitals, and the ceiling painting is best seen looking up from the nave. The altar, ambo and baptismal font by Christoph and Michael Winkelmann are at the front; the side figures returned from storage are worth locating.

The three bells of the church were funded by private donations from textile industry workers in the local community. This shows how closely the congregation was connected to the city's economic life.