County outline
Where Los Angeles County is located
Area breakdown
Land accounts for 85.5% of Los Angeles County’s measured area and water for 14.5%. Its combined area converts to 12,301 square kilometers or approximately 3,039,642 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 4,060.292 | 10,516.108 | 2,598,586.9 |
| Water | 689.148 | 1,784.885 | 441,054.7 |
| Total | 4,749.44 | 12,300.993 | 3,039,641.6 |
How Los Angeles County compares
By original Census land area, Los Angeles County ranks #11 of 58 in California and #118 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 2.644 times the California county-equivalent median of 1,535.7 square miles. It accounts for 2.6% of the combined county land area in the state.
See the complete California ranking · What counts as a county equivalent?
Population and density of Los Angeles County
The Census Bureau estimates that 9,694,934 people lived in Los Angeles County on July 1, 2025. That ranks #1 of 3,222 county equivalents nationally and #1 of 58 in California. Since the April 1, 2020 estimates base of 10,017,414, the population has declined by 322,480 (−3.2%), compared with −0.5% for California as a whole.
With 4,060.3 square miles of land, that is 2,388 people per square mile (922 per km²), placing Los Angeles County #64 nationally for density and #3 in California. The median county equivalent has 47 people per square mile; the California median is 112. Put another way, there are about 0.268 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 9,996,510 | 9,810,478 | 9,748,524 | 9,732,568 | 9,748,868 | 9,694,934 |
| Change | — | −186,032 | −61,954 | −15,956 | +16,300 | −53,934 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Los Angeles County
88 incorporated places lie at least partly in Los Angeles County. Together they are home to 8,751,178 people (90.3%); the other 943,756 (9.7%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Los Angeles city, with 3,869,089 residents in the county. Among places with at least 1,000 residents in 2020, Duarte city grew fastest since then (+5.2%).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Los Angeles cityCounty seat | 3,869,089 | −0.8% | 470.5 |
| Long Beach city | 450,469 | −3.5% | 50.7 |
| Santa Clarita city | 228,430 | −1.9% | 73.6 |
| Glendale city | 187,160 | −4.8% | 30.5 |
| Lancaster city | 170,084 | −2% | 94.3 |
| Palmdale city | 161,845 | −4.5% | 106.1 |
| Pomona city | 147,807 | −2.4% | 23 |
| Torrance city | 138,391 | −5.8% | 20.5 |
| Pasadena city | 135,804 | −2.7% | 23 |
| Downey city | 108,468 | −5.1% | 12.4 |
| West Covina city | 105,301 | −3.8% | 16 |
| El Monte city | 105,075 | −4% | 9.557 |
| Burbank city | 102,988 | −4% | 17.3 |
| Inglewood city | 101,662 | −5.7% | 9.067 |
| Norwalk city | 97,104 | −5.5% | 9.707 |
Show the other 73 places
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Carson city | 90,808 | −5% | 18.7 |
| Compton city | 90,500 | −5.5% | 10 |
| Santa Monica city | 90,082 | −3.2% | 8.409 |
| South Gate city | 90,071 | −2.9% | 7.237 |
| Whittier city | 85,815 | −3.5% | 14.8 |
| Hawthorne city | 82,741 | −6.1% | 6.087 |
| Alhambra city | 79,820 | −3.7% | 7.631 |
| Lakewood city | 78,010 | −5.4% | 9.394 |
| Bellflower city | 74,719 | −5.7% | 6.117 |
| Baldwin Park city | 68,880 | −4.6% | 6.632 |
| Redondo Beach city | 67,281 | −6.1% | 6.198 |
| Lynwood city | 63,512 | −5.5% | 4.841 |
| Montebello city | 60,693 | −3.1% | 8.328 |
| Pico Rivera city | 58,915 | −5.1% | 8.315 |
| Gardena city | 58,460 | −4.2% | 5.829 |
| Monterey Park city | 57,457 | −5.9% | 7.672 |
| Arcadia city | 54,117 | −4.5% | 10.9 |
| Diamond Bar city | 51,884 | −6% | 14.9 |
| Huntington Park city | 51,544 | −6.1% | 3.008 |
| Paramount city | 50,755 | −5.6% | 4.726 |
| Glendora city | 49,671 | −5.6% | 19.5 |
| Rosemead city | 49,410 | −3.4% | 5.162 |
| Covina city | 49,404 | −3.6% | 7.035 |
| Azusa city | 47,447 | −5.8% | 9.661 |
| Cerritos city | 46,367 | −6.5% | 8.727 |
| La Mirada city | 45,952 | −5.6% | 7.824 |
| Rancho Palos Verdes city | 39,654 | −6.2% | 13.5 |
| Culver City city | 39,452 | −3.3% | 5.112 |
| Monrovia city | 38,264 | +0.9% | 13.6 |
| San Gabriel city | 38,186 | −3.5% | 4.144 |
| Bell Gardens city | 37,367 | −5.4% | 2.459 |
| La Puente city | 36,423 | −4.3% | 3.478 |
| Claremont city | 35,838 | −4.4% | 13.3 |
| Temple City city | 35,125 | −3.7% | 4.005 |
| West Hollywood city | 34,231 | −4.5% | 1.887 |
| Manhattan Beach city | 33,122 | −6.6% | 3.934 |
| San Dimas city | 32,978 | −5.5% | 15 |
| Bell city | 31,625 | −5.8% | 2.508 |
| Beverly Hills city | 30,764 | −5.9% | 5.711 |
| La Verne city | 30,178 | −4.5% | 8.453 |
| Lawndale city | 29,892 | −6.1% | 1.972 |
| Walnut city | 27,316 | −3.9% | 8.989 |
| South Pasadena city | 25,503 | −5.3% | 3.409 |
| Maywood city | 23,600 | −6% | 1.172 |
| San Fernando city | 23,449 | −2.1% | 2.374 |
| Duarte city | 22,866 | +5.2% | 6.738 |
| Calabasas city | 22,027 | −5.2% | 13.7 |
| Cudahy city | 21,445 | −6% | 1.176 |
| Lomita city | 19,724 | −5.9% | 1.912 |
| La Cañada Flintridge city | 19,480 | −5.3% | 8.631 |
| Agoura Hills city | 19,243 | −5.2% | 7.796 |
| South El Monte city | 18,963 | −3% | 2.844 |
| Santa Fe Springs city | 18,793 | −2.2% | 8.858 |
| Hermosa Beach city | 18,513 | −6.3% | 1.426 |
| El Segundo city | 16,379 | −5.1% | 5.449 |
| Artesia city | 15,789 | −3.7% | 1.62 |
| Hawaiian Gardens city | 13,373 | −5.5% | 0.945 |
| Palos Verdes Estates city | 12,559 | −5.9% | 4.776 |
| San Marino city | 11,964 | −4.3% | 3.766 |
| Commerce city | 11,688 | −5.5% | 6.534 |
| Signal Hill city | 11,153 | −5.9% | 2.189 |
| Sierra Madre city | 10,620 | −5.8% | 2.951 |
| Malibu city | 9,574 | −10.1% | 19.8 |
| Rolling Hills Estates city | 7,948 | −4.1% | 3.577 |
| Westlake Village city | 7,505 | −6.5% | 5.187 |
| La Habra Heights city | 5,327 | −6.1% | 6.159 |
| Avalon city | 3,237 | −6.3% | 2.886 |
| Hidden Hills city | 1,675 | −2.4% | 1.688 |
| Rolling Hills city | 1,641 | −5.7% | 2.99 |
| Irwindale city | 1,439 | −1.9% | 8.824 |
| Bradbury city | 888 | −4% | 1.963 |
| Vernon city | 207 | −6.8% | 4.973 |
| Industry city | 199 | −24.6% | 11.8 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Los Angeles County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Los Angeles County is a central county of the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area, in the Los Angeles-Long Beach-Glendale, CA metropolitan division. Its 2 county equivalents have 12,844,441 residents on 4,853.5 square miles of land; Los Angeles County accounts for 83.7% of the land and 75.5% of the residents. By combined land it ranks #53 of 393 metropolitan areas, and #2 by population. It belongs to the Los Angeles-Long Beach, CA Combined Statistical Area.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Los Angeles County | 9,694,934 | 4,060.3 |
| Orange County | 3,149,507 | 793.2 |
ZIP codes
304 ZIP Code Tabulation Areas have land in Los Angeles County; 295 of them have most of their land inside the county, and the others mainly cover neighboring areas.
90001900029000390004900059000690007900089001090011900129001390014900159001690017900189001990020900219002290023900249002590026900279002890029900319003290033900349003590036900379003890039900409004190042900439004490045900469004790048900499005290056900579005890059900619006290063900649006590066900679006890069900719007390077900799008990094900959020190210902119021290220902219022290230902329024090241902429024590247902489024990250902549025590260902629026390265902669027090272902749027590277902789028090290902919029290293903019030290303903049030590401904029040390404904059050190502905039050490505905069060190602906039060490605906069062390630906319063890639906409065090660906709070190703907049070690710907129071390715907169071790723907319073290740907449074590746907479075590802908039080490805908069080790808908109081390814908159082290831908409100191006910079100891010910119101691020910249103091040910429104691101911039110491105911069110791108911259120191202912039120491205912069120791208912109121491301913029130391304913069130791311913169132191324913259132691330913319133591340913429134391344913459135091351913529135491355913569136191362913649136791371913819138491387913909140191402914039140591406914119142391436915019150291504915059150691601916029160491605916069160791608917029170691709917119172291723917249173191732917339174091741917449174591746917489175091754917559175991765917669176791768917709177391775917769178091789917909179191792918019180392397932439351093532935349353593536935439354493550935519355293553935609356393591
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Los Angeles County
Los Angeles County shares a land border with 4 county equivalents. It has more land than 2 of them. The largest neighbor is San Bernardino County (20,068.4 mi²) and the smallest is Orange County (793.2 mi²). Together with its neighbors, Los Angeles County forms a block of 34,897.4 mi² of land, of which it holds 11.6%.
| Bordering county equivalent | Land mi² | Size vs. Los Angeles | Compare |
|---|---|---|---|
| San Bernardino County | 20,068.4 | 4.9× larger | Compare |
| Kern County | 8,134.7 | 2× larger | Compare |
| Ventura County | 1,840.8 | 2.2× smaller | Compare |
| Orange County | 793.2 | 5.1× smaller | Compare |
How big is Los Angeles County compared with U.S. states?
Los Angeles County has more land than 2 of the 50 states. It is about 2.1 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.2 times as much land (4,842.5 mi²). California’s county land could hold about 38 areas the size of Los Angeles County.
Another way to picture it: the same land area would fill a square about 63.7 miles (102.5 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Los Angeles County?
Los Angeles County has more land than 3,104 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Los Angeles County at #99 nationally by total area, 19 places closer to the top than its land rank. The water assigned to this geography moves it ahead of some county equivalents with more land.
Its water share is 14.5%, compared with a national county-equivalent median of 1.2% — 13.3 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Los Angeles County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #117 | Lincoln County, Wyoming | 4,075.3 | Compare |
| #118 | Los Angeles County, California | 4,060.3 | This county |
| #119 | Hawaii County, Hawaii | 4,028.4 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 34.196398, -118.261862. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 10,516,107,376 m²; AWATER: 1,784,884,136 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Los Angeles County?
Los Angeles County, California has 4,060.3 square miles (10,516.1 km²) of land and 689.1 square miles of water, for a total area of 4,749.4 square miles. It ranks #118 of 3,222 U.S. county equivalents by land area.
Is Los Angeles County the largest county in California?
No. Los Angeles County ranks #11 of 58 in California by land area. The largest is San Bernardino County, with 20,068.4 square miles of land.
What counties border Los Angeles County?
Los Angeles County shares a land border with Kern County, Ventura County, San Bernardino County, and Orange County.
What is the population of Los Angeles County?
The Census Bureau estimates Los Angeles County had 9,694,934 residents on July 1, 2025, ranking #1 of 3,222 county equivalents. That is 2,388 people per square mile of land.
What is the county seat of Los Angeles County?
The county seat of Los Angeles County is Los Angeles.
What cities and towns are in Los Angeles County?
Los Angeles County has 88 incorporated places. The most populous five are Los Angeles city, Long Beach city, Santa Clarita city, Glendale city, and Lancaster city; 943,756 residents live outside any incorporated place.
Is Los Angeles County part of a metropolitan area?
Yes. It is a central county of the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area, which has 2 county equivalents and 12,844,441 residents.
How many ZIP codes are in Los Angeles County?
304 ZIP Code Tabulation Areas have land in Los Angeles County, and 295 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Los Angeles County compare with U.S. states?
It has more land than 2 of the 50 states, including Delaware (1,948.6 square miles of land).
How many acres of land are in Los Angeles County?
The land measurement converts to approximately 2,598,587 acres. Including water, total area is approximately 3,039,642 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.