Seattle Mar Thoma Church
Seattle, Washington
Last updated May 2026

~1,793
estimated members
Based on ARDA 2020 data, this is likely one of 142 Non-Denominational congregations in King County, WA, with an average size of approximately 1,793 members. Non-Denominational accounts for 29% of the county's 1,467 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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