St. Matthew Church of Islip
Brentwood, New York
Last updated September 2026
5,000-20,000
estimated members
This is likely one of 72 Catholic congregations in Suffolk County, NY. Catholic accounts for 10% of the county's 726 congregations.
This estimate comes from ARDA 2020 data for churches of this size and denomination in the county.
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Create free accountNearby churches in Brentwood
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