
Mount Olive
- County:
- Macoupin County
- County Seat:
- No
- Area (mi²):
- 1.153
- State:
- Illinois
Mount Olive is a city located in Macoupin County, Illinois. Mount Olive has a 2025 population of 1,925. Mount Olive is currently declining at a rate of -0.93% annually and its population has decreased by -4.47% since the most recent census, which recorded a population of 2,015 in 2020.
The average household income in Mount Olive is $74,160 with a poverty rate of 14.75%. The median age in Mount Olive is 50.6 years: 50.4 years for males, and 50.9 years for females.