Because of the long distances between churches, which could be over a hundred miles between the farthest churches, regionalization of churches was implemented. The Diocese has been divided into four regions – North, South, East and West in Southern California and one region in Hawaii. This makes coordination of services, regional meetings among local priests, deacons, and Sunday School teachers, more feasible and practical. Also, services such as retreats and other activities can be combined.

The first church acquired by newly immigrant Copts to Southern California was St. Mark in Los Angeles. The number of churches has steadily grown, as reflected in the following list.

Eastern Region

9 Parishes Serving the Inland Empire and Surrounding Areas

St. Abanoub and St. Antony Coptic Orthodox Church
Norco, CA
St. George the New Martyr Coptic Orthodox Church
Hemet, CA
St. John Coptic Orthodox Church
Covina, CA
St. Justina Coptic Orthodox Church
Rancho Cucamonga, CA
St. Mary Coptic Orthodox Church
Victorville, CA
St. Mary Magdalene Coptic Orthodox Church
Palm Springs, CA
St. Maurice and St. Verena Coptic Village Retreat Center
Big Bear Lake, CA
St. Maurice Coptic Orthodox Church
Pomona, CA
St. Mina Coptic Orthodox Church
Colton, CA

Western Region

8 Parishes Serving Los Angeles and Surrounding Areas

Holy Annunciation Coptic Orthodox Church
Hawthorne, CA
Holy Resurrection American Coptic Orthodox Church
Los Angeles, CA
Holy Virgin Mary and Saint Pishoy Coptic Orthodox Church
Los Angeles, CA
St. Bishoy and St. Paul Coptic Orthodox Church
Los Angeles, CA
St. Cyril of Alexandria Coptic Orthodox Church
El Monte, CA
St. Mark Coptic Orthodox Church (LA)
Los Angeles, CA
St. Mercurious and St. Abraam Coptic Orthodox Church
Torrance, CA
St. Peter and St. Paul Coptic Orthodox Church
Santa Monica, CA

Northern Region

9 Parishes Serving the San Fernando Valley and Surrounding Areas

Archangel Michael Coptic Orthodox Church (SV)
Simi Valley, CA
Archangel Raphael and St. Mina Coptic Orthodox Church
Palmdale, CA
Archangels Michael and Gabriel Coptic Orthodox Church
Fresno, CA
Church of the Three Abba Makari
Santa Maria, CA
St. Demiana Coptic Orthodox Church
Bakersfield, CA
St. George and St. Bishoy Coptic Orthodox Church
Visalia, CA
St. John the Baptist Coptic Orthodox Church
Oxnard, CA
St. Mary and St. Athanasius Coptic Orthodox Church
Northridge, CA
St. Mary of Egypt Coptic Orthodox Church
Newhall, CA

Southern Region

10 Parishes Serving Orange County and Surrounding Areas

Archangel Michael Coptic Orthodox Church (OC)
Santa Ana, CA
Holy Cross Coptic Orthodox Church
Oceanside, CA
St. Demiana Coptic Orthodox Church
San Diego, CA
St. George Coptic Orthodox Church
Bellflower, CA
St. Marina Coptic Orthodox Church
Irvine, CA
St. Mary and St. Verena Coptic Orthodox Church
Anaheim, CA
St. Paul American Coptic Orthodox Church
Tustin, CA
St. Pope Kyrillos VI Coptic Orthodox Church
Westminster, CA
St. Thomas the Hermit Coptic Orthodox Church
Temecula, CA
St. Verena and the Three Holy Youth Coptic Orthodox Church
Orange, CA

Hawaii Region

1 Parish Serving Hawaii and Her Islands

St. Mark Coptic Orthodox Church (HI)
Honolulu, HI