St. Peter is a Roman Catholic church in Danbury, Connecticut, part of the Diocese of Bridgeport.

[1] In more recent time, the parish has a significant number of parishioners of Latino and Brazilian heritage.

For a time, services were held in various locations: the home of James Croal on Deer Hill, the Union Hall on Main Street, and Erwins's academy.

Thomas Ryan secured the use of the Courthouse for a brief period prior to purchasing the former Universalist church building at Main and Wooster.

Thomas Drea was pastor in 1858 and had responsibility for missions in Brookfield, New Fairfield, Newtown, Redding Ridge, and Ridgefield.

[4] The cornerstone of St. Peter's Church was laid on August 28, 1870, by Bishop Francis Patrick McFarland of Hartford.

[5] As the first Catholic church built in northern Fairfield County, St. Peter's drew parishioners from the surrounding towns, many of whom walked a considerable distance to Sunday Mass, at a time when the Eucharistic fast began at midnight.

The church's stained glass was produced in Munich, Germany, supplied by the Royal Bavarian Art Institute and the F. X. Zettler Company.

[6] The 1870 church and its associated buildings are significant contributing properties of the Main Street Historic District (Danbury, Connecticut) of the U.S. National Register of Historic Places and is the Mother Church for the Roman Catholic communities of Danbury, Bethel, Redding, Ridgefield and Georgetown.

In recent years the parish has welcomed a number of Brazilian and Latino Catholics who have settled in Danbury.