Overview
Los Angeles County is home to 9,848,406 people (Census ACS 5-Year, 2023), making it the most populous county in the United States. No other county comes close. The next largest, Cook County in Illinois, has roughly half the population.
Median household income sits at $87,760 (Census ACS 5-Year, 2023), higher than 91% of U.S. counties. That figure lands near the middle of the pack within California, ranking above 57% of the state's counties. The gap between L.A. County's income and the national median reflects California's higher cost structure as much as any particular prosperity.
The county's labor force of 5,148,903 workers (BLS LAUS, 2025) is larger than the total population of most U.S. states. Its 88 FEMA-declared disasters (FEMA OpenFEMA, 2026) place it at the top nationally for disaster frequency, with fire as the dominant threat.
Demographics
L.A. County skews young. The median age is 37.9 (Census ACS 5-Year, 2023), lower than about 80% of U.S. counties. That's partly a function of the county's large Hispanic population and immigration patterns that bring working-age adults and families.
The racial composition reflects one of the most diverse counties in the country. Hispanic residents make up 48.3% of the population (Census ACS 5-Year, 2023), higher than 96% of U.S. counties. White residents account for 25.2%, Asian residents 14.8%, and Black residents 7.5%. The Asian population share ranks above 99% of counties nationally.
Educational attainment runs high. About 35.5% of adults hold a bachelor's degree or higher (Census ACS 5-Year, 2023), above 87% of U.S. counties. Within California, that puts L.A. County in the upper third. The figure masks significant variation across the county's 88 cities and unincorporated areas, where college attainment rates range widely by neighborhood.
Education
L.A. County spent $18,550 per pupil (Education Data Portal, 2020), roughly 24% above the national average of about $15,000. Total enrollment reached 1,382,191 students (Education Data Portal, 2021), the largest of any county in the nation.
The student-teacher ratio of 21.6:1 (Education Data Portal, 2021) is notably higher than the national average of roughly 15.5:1, ranking above 98% of U.S. counties. Larger class sizes are a persistent feature of California's public schools, driven by funding formulas and population density.
The graduation rate of 84.1% (Education Data Portal, 2019) falls below the national average of about 87%. It ranks lower than roughly 60% of counties within California. Higher spending hasn't translated into higher completion rates here.
Economy & Employment
The county's labor force numbered 5,148,903 in 2025 (BLS LAUS, 2025), with 4,889,561 employed. The unemployment rate of 5.0% sits above most California counties, ranking higher than only 33% of counties statewide.
Median household income of $87,760 (Census ACS 5-Year, 2023) sounds comfortable until you account for the cost of living. Per capita income is $44,319 (Census ACS 5-Year, 2023), above 89% of U.S. counties.
The poverty rate tells a different story. At 13.4% (Census ACS 5-Year, 2023), it's higher than about half of all U.S. counties and above two-thirds of California counties. In a county where average AGI reaches $100,091 (IRS Statistics of Income, 2021), that poverty rate points to sharp income inequality. High earners pull the averages up while a substantial share of residents falls below the poverty line.
IRS data shows 4,799,060 tax returns filed with total adjusted gross income of $480.3 billion (IRS Statistics of Income, 2021). Average income per return was $101,171, higher than 93% of U.S. counties. The aggregate numbers are staggering, but they concentrate among top earners.
Housing & Cost of Living
The median home value is $783,300 (Census ACS 5-Year, 2023). That's above 99% of U.S. counties and 81% of California counties. At roughly nine times the median household income, homeownership is out of reach for most renters without existing equity or family wealth.
Median gross rent runs $1,893 per month (Census ACS 5-Year, 2023), above 98% of U.S. counties. A household earning the median income would spend about 26% of gross pay on rent, just under the 30% threshold that housing experts consider cost-burdened.
The county has 3,624,084 total housing units (Census ACS 5-Year, 2023) with a vacancy rate of just 6.5%, lower than 90% of U.S. counties. Low vacancy means tight supply, which keeps upward pressure on both rents and home prices.
Fair market rent data from HUD (HUD Fair Market Rents, 2026) is available for the county but bedroom-level breakdowns were not included in this dataset.
The math is straightforward: incomes rank well above the national median, but housing costs rank even higher. That gap defines the affordability problem.
Health & Wellness
The obesity rate is 26.4% (CDC PLACES, 2023), lower than 97% of U.S. counties. L.A. County residents are, by this measure, among the leanest in the country. High blood pressure follows a similar pattern at 28.4%, lower than 90% of counties nationally.
Depression prevalence is 19.3% (CDC PLACES, 2023), lower than 92% of U.S. counties. Poor mental health days affect 16.6% of residents, also below most counties. Poor physical health days were reported by 13.7%.
Diabetes prevalence stands at 11.6% (CDC PLACES, 2023). About 70.7% of residents had an annual checkup, and 84.0% received cholesterol screening.
The uninsured rate is 11.8% (CDC PLACES, 2023), higher than 63% of U.S. counties. For a state that expanded Medicaid under the Affordable Care Act, that figure reflects the county's large immigrant population, many of whom lack access to public insurance programs. Closing that gap remains a policy challenge.
Climate & Natural Disasters
Los Angeles County has recorded 88 federal disaster declarations, more than any other county in the country (FEMA OpenFEMA, 2026). Fire accounts for the majority of them. That's not a statistical quirk. It's the defining risk profile of living here.
The climate is mild by most measures. Average temperatures run 63.8°F annually, with highs reaching 74.4°F and lows settling around 53.3°F (NOAA Climate Data Online, 2025). Annual precipitation is just 19.9 inches, and snowfall is essentially zero, averaging 1 inch per year (NOAA Climate Data Online, 2025). For day-to-day life, the weather is as good as it gets.
The disaster record tells a different story. Fire declarations appear in nearly every year going back to 1970. The pattern has intensified: from 2016 through 2025, the county logged fire-related federal declarations in every single year. January 2025 alone produced four separate fire declarations, including a major disaster declaration (DR-4856) and three fire management assistance grants (FEMA OpenFEMA, 2026). August 2025 added another.
Flood events punctuate the record too, typically following years of heavy winter rain. The county received two separate flood emergency declarations in early 2023 (FEMA OpenFEMA, 2026). Earthquakes appear three times in the dataset, including the 1994 Northridge event (DR-1008), which caused over $20 billion in damage.
The wildfire risk isn't static. It's been rising. Anyone buying property here, particularly in hillside or foothill communities, should treat fire insurance availability and cost as a first-order question, not an afterthought.
Financial Profile
No county in the country files more tax returns or reports more total income. Los Angeles County submitted 4,799,060 returns in 2021, with total adjusted gross income of $480.3 billion (IRS Statistics of Income, 2021). Both figures rank first nationally, and it's not close.
The average tells a different story than the total. Average AGI was $100,091 (IRS Statistics of Income, 2021), placing the county higher than 93% of U.S. counties. High, but not the extreme outlier the aggregate numbers suggest. The distribution runs from domestic workers and day laborers to entertainment executives and tech founders, and a single mean compresses all of that into one number that accurately describes almost no one.
The banking sector matches the county's scale. 624 branches held $241.4 billion in deposits as of 2023 (FDIC Summary of Deposits, 2023), ranking 99th nationally. That deposit base exceeds the GDP of many mid-sized countries.
Social Security supports 1,505,080 beneficiaries (SSA OASDI, 2024), the highest count of any county in the country. For roughly 15% of residents, it's a meaningful income floor. As the large Boomer cohort continues aging, that number will climb, adding predictable transfer income to the county's economic base even as labor force participation shifts.
The aggregate financial picture here is unambiguous. What it can't show is how income gains at the top translate, or don't, into conditions at the median. Average AGI higher than 93% of U.S. counties describes a prosperous county. Whether that prosperity reaches broadly enough is the question the averages were built to obscure.
Key Comparisons
L.A. County occupies an unusual position. It ranks at or near the top nationally in sheer scale (population, labor force, housing units, tax returns, disaster count) but falls closer to the middle on per-capita and rate-based measures within California.
Income tells this story clearly. Median household income of $87,760 (Census ACS 5-Year, 2023) is above 91% of U.S. counties but only 57% of California counties. The county is wealthy by national standards and middling by state standards.
Housing costs are high everywhere you measure. The median home value of $783,300 sits above 99% of U.S. counties and 81% of California counties. Rent follows the same pattern. These costs erode the income advantage.
Health outcomes are generally favorable. Obesity, hypertension, and depression rates all fall well below national norms. The uninsured rate of 11.8% is the notable exception, running above most of the country.
Education spending of $18,550 per pupil exceeds the national average, but the 84.1% graduation rate falls below it. The student-teacher ratio of 21.6:1 is among the highest nationally. More money per student hasn't offset the challenges of scale.
The county's disaster exposure is unmatched. Eighty-eight FEMA declarations, concentrated in fire, make it the most disaster-prone county in the country by this measure.
Data Sources
- Census ACS 5-Year, 2023: Population, income, housing, demographics, education attainment, commute, poverty
- BLS LAUS, 2025: Unemployment, employment, labor force
- CDC PLACES, 2023: Health metrics, insurance coverage
- HUD Fair Market Rents, 2026: Fair market rent data
- FEMA OpenFEMA, 2026: Disaster declarations and history
- IRS Statistics of Income, 2021: Tax returns, adjusted gross income
- NOAA Climate Data Online, 2025: Temperature, precipitation
- SSA OASDI, 2024: Social Security beneficiaries
- Education Data Portal, 2019-2021: Per-pupil spending, enrollment, student-teacher ratio, graduation rate