- Aliso Viejo, incorporated in 2001
- Anaheim, incorporated in 1870
- Brea, incorporated in 1917
- Buena Park, incorporated in 1953
- Costa Mesa, incorporated in 1953
- Cypress, incorporated in 1956
- Dana Point, incorporated in 1989
- Fountain Valley, incorporated in 1957
- Fullerton, incorporated in 1904
- Garden Grove, incorporated in 1956
- Huntington Beach, incorporated in 1909
- Irvine, incorporated in 1971
- La Habra, incorporated in 1925
- La Palma, incorporated in 1955
- Laguna Beach, incorporated in 1927
- Laguna Hills, incorporated in 1991
- Laguna Niguel, incorporated in 1989
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- Laguna Woods, incorporated in 1999
- Lake Forest, incorporated in 1991
- Los Alamitos, incorporated in 1960
- Mission Viejo, incorporated in 1988
- Newport Beach, incorporated in 1906
- Orange, incorporated in 1888
- Placentia, incorporated in 1926
- Rancho Santa Margarita, incorporated in 2000
- San Clemente, incorporated in 1928
- San Juan Capistrano, incorporated in 1961
- Santa Ana, incorporated in 1886
- Seal Beach, incorporated in 1915
- Stanton, incorporated in 1956
- Tustin, incorporated in 1927
- Villa Park, incorporated in 1962
- Westminster, incorporated in 1957
- Yorba Linda, incorporated in 1967
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