
Ocosta
- County:
- Grays Harbor County
- County Seat:
- No
- Area (mi²):
- 3.003
- State:
- Washington
Ocosta is a CDP located in Grays Harbor County, Washington. Ocosta has a 2025 population of 139. Ocosta is currently growing at a rate of 6.92% annually but its population has decreased by -26.84% since the most recent census, which recorded a population of 190 in 2020.
The average household income in Ocosta is $49,056 with a poverty rate of 23.95%. The median age in Ocosta is 56.7 years: 56 years for males, and 65.3 years for females.