St Mary's Catholic Church
Grand Forks, North Dakota
Last updated May 2026

~1,640
estimated members
Based on ARDA 2020 data, this is likely one of 8 Catholic congregations in Grand Forks County, ND, with an average size of approximately 1,640 members. Catholic accounts for 37% of the county's 78 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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