St. William Catholic Church
Hermiston, Oregon
Last updated May 2026

~620
estimated members
Based on ARDA 2020 data, this is likely one of 3 Catholic congregations in Morrow County, OR, with an average size of approximately 620 members. Catholic accounts for 44% of the county's 25 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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