Sugar City is a city in Madison County, Idaho, United States. The population was 1,715 at the 2020 census, up from 1,514 in 2010. It is part of the Rexburg Micropolitan Statistical Area.

Madison County is a county located in the U.S. state of Idaho. As of the 2020 census, the population was 52,913. The county seat and largest city is Rexburg. Madison County is part of the Rexburg, Ida