Contra Costa County, CA Population Statistics: Density Map Data
Analyze local population trends, population density map, housing costs, and the local economy.
Area Snapshot Statistics
Key statistics on population, economy, housing, and commuting compared to state and national averages. Explore interactive maps for deeper analysis.
Population: density and quick facts
| Metric | Contra Costa County | California Avg | U.S. Average |
|---|---|---|---|
| Population | 1,149,840 | 38,909,900 | 334,821,731 |
| Population density (per sq mi) | 1431.1 | 237.3 | 85.8 |
| Population growth (%/yr) | 0.57% | 0.19% | 0.57% |
| Median age | 40.5 | 35.4 | 37.1 |
| Households | 411,575 | 13,415,389 | 128,459,983 |
Population in Contra Costa County grew by 13.6% from 2009 to 2023, reaching 1,161,207 in 2023.
Population Growth 2009–2023
Race & Ethnicity
Economy
Contra Costa County has a the economy index of B, which means it is quite prosperous.
| Metric | Contra Costa County | California Avg | U.S. Average |
|---|---|---|---|
| Median household income | $125,703 | $96,718 | $78,145 |
| Income growth (%/yr) | 5.97% | 6.01% | 5.07% |
| Unemployment rate | 5.9% | 6.4% | 5.2% |
The median household income in Contra Costa County is about 30% higher than in California.
Housing
| Metric | Contra Costa County | California Avg | U.S. Average |
|---|---|---|---|
| Median home price | $707,443 | $642,203 | $242,182 |
| Median rent | $2,321 | $1,955 | $1,342 |
| Homeownership rate | 67.7% | 55.8% | 65.1% |
The median home price in Contra Costa County is about 25.4 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $2,321 per month for that long.
Commute Time & Mobility
Commuters in Contra Costa County spend about 62 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 260 hours, about 10.8 full days, spent commuting.
| Metric | Contra Costa County | California Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 31.2 | 23.6 | 22.5 |
| Round-trip commute (min) | 62.4 | 47.2 | 44.9 |
| Yearly time spent (hours) | 260 | 197 | 187 |
| Estimated yearly cost | $8,066 | $6,099 | $5,803 |
| Work from home | 19.2% | 15.5% | 13.4% |
| Highway traffic (vehicles/day) | 23,932 | 16,509 | 8,813 |
| Local road traffic (vehicles/day) | 3,453 | 2,449 | 1,355 |
Fastest commutes among counties in
California:
Inyo County (11.2 min), Del Norte County (11.7 min), Modoc County (11.8 min).
Slowest:
Contra Costa County (31.2 min), San Benito County (31.0 min), Alpine County (30.4 min).
The average commute time in Contra Costa County is 31 minutes, longer than the 24 minutes in California.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Contra Costa County has a education index of A, which means it is very educated.
| Metric | Contra Costa County | California Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 41.2% | 33.0% | 31.6% |
| Average household size | 2.79 | 2.85 | 2.54 |
Highest education index among counties in
California:
Marin County (0.5), San Francisco County (0.4), Santa Clara County (0.4).
Lowest:
Colusa County (0.2), Merced County (0.2), Glenn County (0.2).
Health
Contra Costa County has a health index of A, which means it is very healthy.
| Metric | Contra Costa County | California Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 80.8 | 79.6 | 78.3 |
| Self-rated poor health | 12.9% | 16.4% | 16.3% |
| Smokers | 10.6% | 13.9% | 19.0% |
Highest health index among counties in
California:
San Francisco County (0.8), San Mateo County (0.8), Santa Clara County (0.8).
Lowest:
Lake County (0.8), Imperial County (0.8), Tulare County (0.8).
Frequently Asked Questions
Common questions about Contra Costa County, California.
What is the population of Contra Costa County, California?
The population of Contra Costa County, California is 1,149,840, compared to the U.S. total of 334,821,731.
What is the population density of Contra Costa County, California?
The population density of Contra Costa County, California is 1431.1 people per square mile, compared to the U.S. average of 85.8 people per square mile.
What is the median household income in Contra Costa County, California?
The median household income in Contra Costa County, California is $125,703, compared to the U.S. median of $78,145.
What is the median home price in Contra Costa County, California?
The median home price in Contra Costa County, California is $707,443, compared to the U.S. median of $242,182.
What is the unemployment rate in Contra Costa County, California?
The unemployment rate in Contra Costa County, California is 5.9%, compared to the U.S. average of 5.2%.