St. Theresa's Parish
Seattle, Washington
Last updated May 2026

~4,188
estimated members
Based on ARDA 2020 data, this is likely one of 68 Catholic congregations in King County, WA, with an average size of approximately 4,188 members. Catholic accounts for 32% of the county's 1,467 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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