Onalaska, Wisconsin

Onalaska, Wisconsin
Downtown Onalaska
Nickname: 
Ona
Location of Onalaska in La Crosse County, Wisconsin.
Onalaska
Onalaska
Coordinates: 43°53′04″N 91°14′07″W / 43.88444°N 91.23528°W / 43.88444; -91.23528
CountryUnited States
StateWisconsin
CountyLa Crosse
Founded byThomas G. Rowe
Government
  MayorKim Smith
Area
  Total
10.97 sq mi (28.43 km2)
  Land10.38 sq mi (26.88 km2)
  Water0.60 sq mi (1.55 km2)
Elevation
700 ft (200 m)
Population
 (2020)
  Total
18,803
  Estimate 
(2022)
18,975
  Density1,825.30/sq mi (704.77/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (Central)
Zipcode
54650
Area code608
FIPS code55-59925
Public TransitLa Crosse MTU
Websitewww.onalaskawi.gov

Onalaska (/ˌɒnəˈlæskə/ ON-ə-LASS-kə) is a city in La Crosse County, Wisconsin, United States. The population was 18,803 at the 2020 census. It borders the larger La Crosse, Wisconsin, and is a part of the La Crosse-Onalaska, WI-MN Metropolitan Area.

Onalaska is built on a slightly elevated ridge above the Black River. Natural areas include both river bottom land and high, heavily wooded, scenic bluffs. A man-made reservoir at the city's western edge is known as Lake Onalaska. Onalaska is known as "The Sunfish Capital of the World."