Lac La Belle is a village located mostly in Waukesha County in the U.S. state of Wisconsin. The population was 281 at the 2020 census. The village is located mostly within the town of Oconomowoc in Waukesha County. On March 28, 2002, the village annexed a portion of land in the town of Ixonia in Jefferson County.

Waukesha County is a county in the U.S. state of Wisconsin. As of the 2020 United States Census, the population was 406,978, making it the third-most populous county in Wisconsin. Its median income of $88,985 placed it as the only county in Wisconsin on the list of the 100 highest-income counties in the U.S. by median income as of 2020. Its county seat and largest city is Waukesha.