- Annunciation Byzantine Catholic Church
- Blessed Sacrament Catholic Church
- Christ Cathedral
- Christ Our Savior Catholic Parish
- Corpus Christi Catholic Church
- Holy Cross Melkite Catholic Church
- Holy Family Catholic Church (Orange)
- Holy Family Church
- Holy Spirit Church
- Holy Trinity Church
- Immaculate Heart of Mary Catholic Church
- Korean Martyrs Catholic Center
- La Purisima Church
- Mission Basilica San Juan Capistrano
- Our Lady of Fatima Church
- Our Lady of Guadalupe Church (Delhi)
- Our Lady of Guadalupe Church (La Habra)
- Our Lady of Guadalupe Church (Santa Ana)
- Our Lady of La Vang Church
- Our Lady of Mount Carmel Church
- Our Lady of Peace Korean Catholic Center
- Our Lady of the Pillar Church
- Our Lady Queen of Angels Church
- Saint Angela Merici Catholic Church
- Saint Anne Church (Santa Ana)
- Saint Anne Church (Seal Beach)
- Saint Anthony Claret Church
- Saint Barbara Church
- Saint Bonaventure Church
- Saint Boniface Church
- Saint Catherine of Siena Church
- Saint Cecilia Church
- Saint Columban Church
- Saint Edward the Confessor Catholic Church
- Saint Elizabeth Ann Seton Church
- Saint George Chaldean Catholic Church
- Saint Hedwig Church
- Saint Irenaeus Church
- Saint Joachim Catholic Church
- Saint John Henry Newman
- Saint John Maron Catholic Church
- Saint John Neumann Church
- Saint John Paul II Polish Center
- Saint John the Baptist Catholic Church
- Saint John Vianney Chapel
- Saint Joseph Church (Placentia)
- Saint Joseph Church (Santa Ana)
- Saint Justin Martyr Church
- Saint Kilian Church
- Saint Martin de Porres Church
- Saint Mary Church
- Saint Mary’s By the Sea Catholic Church
- Saint Michael’s Abbey
- Saint Nicholas Church
- Saint Norbert Catholic Church
- Saint Philip Benizi Church
- Saint Pius V Church
- Saint Polycarp Catholic Church
- Saint Thomas Apostle Syro Malabar Forane Catholic Church
- Saint Thomas Korean Catholic Center
- Saint Thomas More Catholic Church
- Saint Timothy Church
- Saint Vincent de Paul Catholic Church
- Saints Simon & Jude Catholic Church
- San Antonio de Padua del Cañon Church
- San Francisco Solano Catholic Church
- Santa Clara de Asis Church
- Santiago de Compostela Church
- St. Juliana Falconieri Catholic Church
- Vietnamese Catholic Center