Holy Trinity Catholic Church
Great Falls, Idaho
Last updated May 2026
~758
estimated members
Based on ARDA 2020 data, this is likely one of 8 Catholic congregations in Cascade County, MT, with an average size of approximately 758 members. Catholic accounts for 19% of the county's 115 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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