
Onalaska
- County:
- Polk County
- County Seat:
- No
- Area (mi²):
- 5.437
- State:
- Texas
Onalaska is a city located in Polk County, Texas. Onalaska has a 2025 population of 3,317. Onalaska is currently growing at a rate of 1.44% annually and its population has increased by 7.56% since the most recent census, which recorded a population of 3,084 in 2020.
The average household income in Onalaska is $65,080 with a poverty rate of 24.07%. The median age in Onalaska is 45 years: 46 years for males, and 37 years for females.