
Rexburg
- County:
- Madison County
- County Seat:
- Yes
- Area (mi²):
- 10.112
- State:
- Idaho
Rexburg is a city located in Madison County, Idaho. Rexburg has a 2025 population of 40,344. It is also the county seat of Madison County. Rexburg is currently growing at a rate of 0.46% annually and its population has increased by 2.34% since the most recent census, which recorded a population of 39,421 in 2020.
The average household income in Rexburg is $83,753 with a poverty rate of 35.49%. The median age in Rexburg is 21 years: 22.1 years for males, and 20 years for females.