
Union County
- State:
- Mississippi
- County Seat:
- New Albany
Union County's estimated 2025 population is 28,588 with a growth rate of 0.53% in the past year according to the most recent United States census data. Union County is the 28th largest county in Mississippi. The 2010 population was 27,141 and has seen a growth of 5.33% since that time.