1: The San Gabriel Valley City of Pomona
Pop: 10,710 Mil

2: The South City Hub of Mission Viejo
Pop: 10,704 Mil

3: The Mountain Top Village of Lake Arrowhead
Pop: 10,688 Mil

4: The South City of Ladera Ranch
Pop: 10,639 Mil

5: The San Gabriel Valley City of Rosemead
Pop: 10,451 Mil

6: The South City of San Clemente City
Pop: 10,450 Mil

7: The San Gabriel Valley CDP of Puente Hills
Pop: 10,449 Mil

8: The San Gabriel Valley City of Monterey Park
Pop: 10,417 Mil

9: The South City of San Juan Capistrano
Pop: 10,377 Mil

10: The South City of Laguna Woods
Pop: 10,375 Mil

11: The Mountain Top CDP of Running Springs
Pop: 10,354 Mil

12: The San Gabriel Valley CDP of Hacienda Heights
Pop: 10,346 Mil

13: The Valley Town of Ojai
Pop: 10,323 Mil

14: The San Fernando Valley City of Glendale City
Pop: 10,280 Mil

15: The County Seat of San Bernardino City
Pop: 10,273 Mil

16: The Inland City of Fullerton City
Pop: 10,267 Mil

17: The Mountain Valley of Redlands City
Pop: 10,265 Mil

18: The Plain City of Port Hueneme
Pop: 10,253 Mil

19: The San Gabriel Valley City of El Monte
Pop: 9,747 Mil

20: The United Counties of South-Western Republic
Pop: 8,771 Mil