St. Demetrios Greek Orthodox Church
Boston, Massachusetts
Last updated May 2026

~549
estimated members
Based on ARDA 2020 data, this is likely one of 14 Orthodox congregations in Middlesex County, MA, with an average size of approximately 549 members. Orthodox accounts for 1% of the county's 958 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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