is a city in Milwaukee County, Wisconsin, United States. The population was 61,254 at the 2000 census.
The Wisconsin State Fair Park (which includes the Milwaukee Mile, and is the site of the annual Wisconsin State Fair) is located in West Allis.
West Allis is located at (43.00, -88.02). The upper courses of the Root and Kinnickinnic Rivers flow through the city.
According to the United States Census Bureau, the city has a total area of 11.4 square miles (29.4 km²), of which, 11.4 square miles (29.4 km²) of it is land and 0.04 square miles (0.2 km²) of it (0.18%) is water.