
Potomac
- County:
- Vermilion County
- County Seat:
- No
- Area (mi²):
- 0.488
- State:
- Illinois
Potomac is a village located in Vermilion County, Illinois. Potomac has a 2025 population of 651. Potomac is currently declining at a rate of -1.06% annually and its population has decreased by -5.38% since the most recent census, which recorded a population of 688 in 2020.
The average household income in Potomac is $84,532 with a poverty rate of 6.74%. The median age in Potomac is 39.3 years: 40.1 years for males, and 38.7 years for females.