First Congregational Church of Bay Shore

First Congregational Church of Bay Shore is a historic Congregational church complex at 1860 Union Boulevard (SCR 50) on the corner of First Street at Bay Shore, Suffolk County, New York, United States. Contributing elements of the complex consists of three attached units: the 1891 Romanesque Revival / Shingle Style church and rectory. The church is a cruciform plan, gable roofed structure that features a square bell tower and porte cochere. The interior of the church features a variation on the Akron plan configuration. It was designed by Stephenson & Greene of New York.

It was added to the National Register of Historic Places in 2002.