Cities (California)  | Churches (68) |
| Aliso Viejo | Corpus Christi (Parish)  |
| Anaheim | Poong Hesus Nazareno (Tagalog)  |
| Anaheim | St. Anthony Claret (Parish) (English, Spanish)  |
| Anaheim | St. Boniface (Parish) (English, Spanish, Vietnamese)  |
| Anaheim | St. Justin Martyr (Parish) (English, Spanish)  |
| Anaheim | St. Thomas (Parish) (Korean)  |
| Anaheim Hills | San Antonio de Padua (Parish)  Church of St. Anthony of Padua |
| Balboa Island | St. John Vianney  |
| Brea | St. Angela Merici (Parish) (English, Spanish)  |
| Buena Park | St. Pius V (Parish) (English, Spanish)  |
| Capistrano Beach | San Felipe de Jesus (English, Spanish)  |
| Costa Mesa | St. Joachim (Parish) (English, Spanish)  |
| Costa Mesa | St. John the Baptist (Parish) (English, Spanish)  |
| Cypress | St. Irenaeus (Parish) (English, Spanish)  |
| Dana Point | St. Edward the Confessor (Parish)  |
| Fountain Valley | Holy Spirit (Parish) (English, Spanish, Vietnamese)  |
| Fullerton | St. Juliana Falconieri (Parish)  |
| Fullerton | St. Mary (Parish) (English, Spanish)  |
| Fullerton | St. Philip Benizi (Parish) (English, Spanish)  |
| Garden Grove | Christ (Cathedral) (English, Chinese, Vietnamese)  |
| Garden Grove | St. Columban (Parish) (English, Spanish, Vietnamese)  |
| La Habra | Our Lady of Guadalupe (Parish) (English, Spanish)  |
| Huntington Beach | St. Bonaventure (Parish) (English, Spanish, Vietnamese)  |
| Huntington Beach | St. Mary’s by the Sea (Parish) (English, Latin)  |
| Huntington Beach | Sts. Simon and Jude (Parish)  |
| Huntington Beach | St. Vincent de Paul (Parish) (Spanish)  |
| Irvine | Our Lady of Peace (Korean)  |
| Irvine | St. Elizabeth Ann Seton (Parish) (English, Korean)  |
| Irvine | St. John Neumann (Parish)  |
| Irvine | St. Thomas More (Parish) (English, Chinese)  |
| Ladera Ranch | Holy Trinity (Parish)  |
| Laguna Beach | St. Catherine of Siena (Parish) (English, Spanish)  |
| Laguna Hills | St. Nicholas (Parish) (English, Vietnamese)  |
| Laguna Niguel | St. Timothy (Parish)  |
| Lake Forest | Santiago de Compostela (Parish) (Spanish, English)  |
| Los Alamitos | St. Hedwig (Parish) (English, Spanish)  |
| Mission Viejo | St. Kilian (Parish)  |
| Newport Beach | Our Lady of Mount Carmel (Parish)  |
| Newport Beach | Our Lady Queen of Angels (Parish)  |
| Orange | Holy Family (Former Cathedral, Parish)  |
| Orange | La Purisima (Parish) (English, Spanish, Vietnamese)  |
| Orange | St. Norbert (Parish) (English, Spanish)  |
| Placentia | St. Joseph (Parish) (English, Spanish)  |
| Rancho Santa Margarita | San Francisco Solano (Parish)  |
| Santa Ana | Christ Our Savior (Parish) (English, Spanish, Vietnamese)  |
| Santa Ana | Immaculate Heart of Mary (Parish) (English, Spanish, Vietnamese)  |
| Santa Ana | Our Lady of Guadalupe (Parish) (Spanish)  |
| Santa Ana | Our Lady of Guadalupe (Parish) (Spanish)  |
| Santa Ana | Our Lady of La Vang (Parish) (English, Spanish, Vietnamese)  |
| Santa Ana | Our Lady of the Pillar (Parish) (English, Spanish)  |
| Santa Ana | St. Anne (Parish) (English, Spanish)  |
| Santa Ana | St. Barbara (Parish) (English, Spanish, Vietnamese)  |
| Santa Ana | St. Joseph (Parish) (English, Spanish)  |
| Santa Ana | Vietnamese Center (Vietnamese)  |
| San Clemente | Our Lady of Fatima (Parish) (English, Spanish)  |
| San Juan Capistrano | San Juan Capistrano (Minor Basilica, National Shrine, Parish) (English, Spanish, Latin)  Mission of St. John Capistrano of Sajavit |
| San Juan Capistrano | Fr. Serra  |
| San Juan Capistrano | San Juan Capistrano  Mission of St. Juan Capistrano |
| Seal Beach | Holy Family (Parish)  |
| Seal Beach | St. Anne (Parish)  |
| Silverado | St. Michael’s Abbey (Monastery)  |
| Stanton | St. Polycarp (Parish) (English, Spanish, Vietnamese)  |
| Tustin | St. Cecilia (Parish) (English, Spanish, Vietnamese)  |
| Westminster | Blessed Sacrament (Parish) (English, Spanish, Vietnamese)  |
| Westminster | Korean Martyrs (Parish) (Korean)  |
| Yorba Linda | Santa Clara de Asis (Parish)  |
| Yorba Linda | St. John Paul II (Parish) (Polish, Latin)  |
| Yorba Linda | St. Martin de Porres (Parish) (English)  |
Cities  | Other Churches Within the Diocesan Territory (7) |
| Anaheim | Annunciation (Ruthenian)  |
| Irvine | St. John Henry Newman (English)  Queen of Life Chapel |
| Orange | St. John Maron (Maronite)  |
| Placentia | Holy Cross (Greek-Melkite)  |
| Santa Ana | St. George (Chaldean)  |
| Santa Ana | St. John Henry Newman  |
| Santa Ana | St. Thomas Apostle (Syro-Malabar)  |