St Mary's Chapel of Petaluma

Santa Rosa, California

DenominationCatholic

Last updated June 2026

Map showing location of St Mary's Chapel of Petaluma

~5,220

estimated members

Based on ARDA 2020 data, this is likely one of 22 Catholic congregations in Sonoma County, CA, with an average size of approximately 5,220 members. Catholic accounts for 64% of the county's 295 congregations.

Source: ARDA 2020 Religious Congregations & Membership Study

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