Summit Lake, Wisconsin
Summit Lake is an unincorporated community and census-designated place in Langlade [County, Wisconsin|Langlade County], Wisconsin, United States. Summit Lake is located along U.S. [Route 45 in Wisconsin|U.S. Route 45], north of Antigo, in the towns of Upham and Elcho. Summit Lake has a post office with ZIP code 54485. As of the 2020 [United States census|2020 census] its population was 141, a slight decrease of 144 at the 2010 census.