
Monarch Mill
- County:
- Union County
- County Seat:
- No
- Area (mi²):
- 5.612
- State:
- South Carolina
Monarch Mill is a CDP located in Union County, South Carolina. Monarch Mill has a 2025 population of 1,755. Monarch Mill is currently declining at a rate of -0.17% annually but its population has increased by 38.84% since the most recent census, which recorded a population of 1,264 in 2020.
The average household income in Monarch Mill is $52,602 with a poverty rate of 24.89%. The median age in Monarch Mill is 33.9 years: 30.7 years for males, and 38.6 years for females.