St. John United Church
Baltimore, Maryland
Last updated May 2026

~6,221
estimated members
Based on ARDA 2020 data, this is likely one of 9 Catholic congregations in Howard County, MD, with an average size of approximately 6,221 members. Catholic accounts for 39% of the county's 222 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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