Saint Mary Catholic Church
Hermiston, Oregon
Last updated June 2026

~1,866
estimated members
Based on ARDA 2020 data, this is likely one of 6 Catholic congregations in Umatilla County, OR, with an average size of approximately 1,866 members. Catholic accounts for 35% of the county's 115 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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