Rexburg is a city in Madison County, Idaho, in the United States. As of the 2000 census, the city population was 17,257. The city is the county seat of Madison County.
Rexburg is the principal city of the Rexburg, ID Micropolitan Statistical Area, which includes Fremont and Madison Counties.
Rexburg is located at Latitude 43° 50' 2" N, and Longitude 111° 48' 18" W.