| Place Name | Mount Olive |
| Place Type | City |
| ZIP Code(s) | 62069 |
| County | Macoupin County |
| Area Code(s) | 217 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 2,150 |
| Population Growth Rate (2010-19) | -4.00% |
| Majority Ethnicity | White 96.03% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Illinois 13th |
| State House Districts | 95 |
| State Senate Districts | 48 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.03% |
| African American | 0.7% |
| Hispanic | 0% |
| Asian | 2.71% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.56% |