| Mountain Township | |
| Settlement Type: | Township |
| Image Map1: | Illinois in United States (US48).svg |
| Map Caption1: | Location of Illinois in the United States |
| Coordinates: | 37.6558°N -88.4342°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Saline |
| Established Title: | Settled |
| Established Date: | November 5, 1889 |
| Leader Title: | Mayor |
| Leader Title1: | Supervisor |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 42.86 |
| Area Land Sq Mi: | 41.87 |
| Area Water Sq Mi: | 1 |
| Elevation Ft: | 883 |
| Population As Of: | 2020 |
| Population Total: | 395 |
| Pop Est Footnotes: | [1] |
| Population Density Sq Mi: | 8.5 |
| Timezone1: | CST |
| Utc Offset1: | -6 |
| Timezone1 Dst: | CDT |
| Utc Offset1 Dst: | -5 |
| Blank Name: | FIPS code |
| Blank Info: | 17-165-50803 |
| Blank2 Name Sec2: | Wikimedia Commons |
Mountain Township is located in Saline County, Illinois. As of the 2020 census, its population was 395 and it contained 181 housing units.[2]
According to the 2010 census, the township has a total area of, of which (or 97.69%) is land and (or 2.33%) is water.[2]