Parish · Ontario, California · Diocese of San Bernardino
San Secondo d'Asti is a Catholic parish in Ontario, part of the Diocese of San Bernardino.
250 N. Turner Ave.
Ontario, California, 91761
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Listed in the Diocese of San Bernardino's directory · location verified October 2026
Our Lady of Mount Carmel (Rancho Cucamonga) — 1.2 mi · Our Lady of Guadalupe (Ontario) — 3.7 mi · St. Joseph (Upland) — 3.9 mi