Orange County, California

County seat: Santa Ana · Population 3.1 million (2025) · 793 sq mi

Orange County is the 3rd most populous of California's 58 counties, with 3,149,507 people (2025 estimate). Its county seat is Santa Ana. The map shows its 34 cities and towns and the 4 neighboring counties.

Map of Orange County, California with cities, towns and the county boundary
Orange County, California with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
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Orange County facts

County seat
Santa Ana
Population (2025 estimate)
3,149,507 −1.2% since 2020
Land area
793 sq mi 47th largest of 58
Water area
157 sq mi
Population density
3,970 per sq mi
Established
1889
Named after
orange citrus fruit of the orange tree
Largest city
Anaheim 341,008
Median household income
$116,289
Cities and towns
34 plus 11 CDPs
ZIP codes
92
Time zone
Pacific
FIPS code
06059

Cities and towns in Orange County

Orange County has 34 incorporated cities, towns and villages. Populations count the people living inside Orange County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
AnaheimCity341,008
IrvineCity318,764
Santa Ana (county seat)City315,586
Huntington BeachCity191,451
Garden GroveCity170,455
FullertonCity138,675
OrangeCity138,365
Costa MesaCity108,881
Mission ViejoCity90,484
WestminsterCity88,966
Lake ForestCity86,333
Newport BeachCity81,977
Buena ParkCity81,741
TustinCity77,843
Yorba LindaCity65,632
Laguna NiguelCity64,107
San ClementeCity62,226
La HabraCity60,908
Fountain ValleyCity55,508
PlacentiaCity54,911
Aliso ViejoCity49,844
CypressCity48,781
BreaCity47,260
Rancho Santa MargaritaCity45,779
StantonCity40,161
San Juan CapistranoCity35,119
Dana PointCity32,232
Laguna HillsCity30,020
Seal BeachCity24,075
Laguna BeachCity22,391
Laguna WoodsCity16,844
La PalmaCity14,907
Los AlamitosCity11,702
Villa ParkCity5,645

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
North Tustin25,807
Ladera Ranch23,793
Coto de Caza15,190
Rancho Mission Viejo11,971
Rossmoor11,532
Midway City7,999
Las Flores5,513
Trabuco Canyon1,326
Silverado972
Modjeska714
Williams Canyon73

ZIP codes in Orange County

92 ZIP codes reach into Orange County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Orange County, 2020–2025

Orange County shrank by 37,772 people (−1.2%) between April 2020 and July 2025: 36,400 more births than deaths and a net loss of 74,117 people from migration.

Year (July 1)Population
20203,186,167
20213,160,780
20223,156,252
20233,149,341
20243,158,027
20253,149,507

Neighboring counties

Printable Orange County map

The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.

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Sources

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