St William's Catholic Church Parish Office
Boston, Massachusetts
Address1351 Main St
DenominationCatholic

~6,001
estimated members
Based on ARDA 2020 data, this is likely one of 107 Catholic congregations in Middlesex County, MA, with an average size of approximately 6,001 members. Catholic accounts for 73% of the county's 958 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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