
Box Elder County
- State:
- Utah
- County Seat:
- Brigham City
Box Elder County's estimated 2025 population is 65,006 with a growth rate of 1.82% in the past year according to the most recent United States census data. Box Elder County is the 9th largest county in Utah. The 2010 population was 50,178 and has seen a growth of 29.55% since that time.