Saint Mary's Basilica
Phoenix, Arizona
Last updated June 2026

~9,710
estimated members
Based on ARDA 2020 data, this is likely one of 105 Catholic congregations in Maricopa County, AZ, with an average size of approximately 9,710 members. Catholic accounts for 49% of the county's 2,655 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
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