| Mt. Olive Township | |
| Settlement Type: | Township |
| Image Map1: | Illinois in United States (US48).svg |
| Map Caption1: | Location of Illinois in the United States |
| Coordinates: | 39.0667°N -134°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Macoupin |
| Established Title: | Settled |
| Established Date: | Unknown |
| Leader Title: | Mayor |
| Leader Title1: | Supervisor |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 18.27 |
| Area Land Sq Mi: | 18.02 |
| Area Water Sq Mi: | 0.26 |
| Elevation Ft: | 643 |
| Population As Of: | 2010 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 3135 |
| Population Density Sq Mi: | 181.7 |
| Timezone1: | CST |
| Utc Offset1: | -6 |
| Timezone1 Dst: | CDT |
| Utc Offset1 Dst: | -5 |
| Blank Name: | FIPS code |
| Blank Info: | 17-117-51037 |
| Blank2 Name Sec2: | Wikimedia Commons |
Mt. Olive Township (N½ T7N R6W) is located in Macoupin County, Illinois, United States. As of the 2010 census, its population was 3,274 and it contained 1,536 housing units.[2]
According to the 2010 census, the township has a total area of, of which (or 98.63%) is land and (or 1.42%) is water.[2]