Cornucopia is an unincorporated census-designated place in the town of Bell in northern Bayfield County, Wisconsin, United States. It is situated on Lake Superior at the northern end of the Bayfield Peninsula. It is along Wisconsin Highway 13 and County Highway C. As of the 2020 census, its population was 103, an increase over the figure of 98 tabulated in 2010. The community borders the lake at Siskiwit Bay, between Roman's Point and Mawikwe Point. It is near a mainland portion of the Apostle Islands National Lakeshore, which features the Mawikwe Bay Sea Caves.