Katholische Kirche Richterswil, Catholic church building in Richterswil, Switzerland

The Catholic Church of Richterswil, dedicated to the Holy Family, is a neo-baroque building by architect Adolf Gaudy, erected in ten months by the Gebrüder Ferrari firm with parishioners' voluntary labour and blessed on 14 June 1914. Originally single-naved, it has a rounded choir, a Käsbissenturm, a three-arched porch with an oculus, and a round side tower leading to the gallery; a 1939 side aisle enlarged it.

After the Reformation of 1529 banned Catholic worship in Zurich's subject lands, Catholics in Richterswil had to attend Mass in neighbouring Schwyz. A men's association founded in 1908 bought a house on Wiesengrundstrasse and held the first Catholic service on Richterswil soil in 385 years on 27 September 1908. The parish priest Leo Munier built the rectory in 1911–1912, and the church by architect Adolf Gaudy was erected in ten months by Gebrüder Ferrari and blessed on 14 June 1914.

The church is dedicated to the Holy Family, but its name recalls the medieval St. Martin's church first mentioned in 1265, whose patronage passed from the lords of Wädenswil to the Knights of St. John of Bubikon in 1287. A local legend holds that the hermit Meinrad baptized a child here between 835 and 861. The parish counted 3,688 members in 2021.

The church stands on Erlenstrasse in Richterswil. The main facade has a porch opened by three arcades and an oculus window; a round tower beside it holds the stair to the gallery. The building was renovated in 2015–2016 and reconsecrated on 10 December 2016.

The church is a diaspora church: after the Reformation of 1529, Catholic worship was banned in Richterswil for 385 years. The first Mass was celebrated again on 27 September 1908 in an emergency chapel set up in a house on Wiesengrundstrasse bought by the Catholic men's association founded that year. The parish counted 3,688 members in 2021.