
Oakley
- County:
- Contra Costa County
- County Seat:
- No
- Area (mi²):
- 15.866
- State:
- California
Oakley is a city located in Contra Costa County, California. Oakley has a 2025 population of 47,281. Oakley is currently growing at a rate of 1.63% annually and its population has increased by 8.74% since the most recent census, which recorded a population of 43,480 in 2020.
The average household income in Oakley is $141,633 with a poverty rate of 6.65%. The median age in Oakley is 36.4 years: 36.6 years for males, and 36.2 years for females.