Organized in 1806, Plains Presbyterian Church was the first church to form in Cranberry Township. Its first services were held in groves and a tent. A log church was built in 1820, replaced by a brick church in 1839, with the present frame structure built in 1878. Plains Church is recognized as a mother church to Evans City and Crestview Presbyterian Churches, with membership released in 1883 and 1890, respectively, to form these area churches. The Plains congregation has been and continues to be a faithful witness to the gospel in the community.