Onalaska is a city in Polk County, Texas, United States.

Situated on a peninsula between the main channel and one arm of Lake Livingston, the population was 3,020 at the 2020 census.

The tornado unroofed a combined store and post office, while ripping out its rear wall, injuring two people.

As of the 2020 United States census, there were 3,020 people, 1,232 households, and 809 families residing in the city.

The district is led by Onalaska ISD Superintendent Anthony Roberts