St. Stephen the Witness Catholic Student Center
Waterloo, Iowa
Last updated May 2026
~1,766
estimated members
Based on ARDA 2020 data, this is likely one of 11 Catholic congregations in Black Hawk County, IA, with an average size of approximately 1,766 members. Catholic accounts for 30% of the county's 168 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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