| Unit Pref: | Imperial |
| Settlement Type: | Township |
| Official Name: | Chemung Township |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | McHenry |
| Leader Title: | Supervisor |
| Established Title: | Established |
| Established Date: | November 6, 1849 |
| Area Total Sq Mi: | 32.97 |
| Area Land Sq Mi: | 32.97 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2020 |
| Population Total: | 9095 |
| Population Density Sq Mi: | 277 |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Website: | https://chemungtownshipil.gov/index |
| Blank Name: | FIPS code |
| Blank Info: | 17-111-12892 |
Chemung Township is the northwesternmost township of McHenry County, Illinois, United States.
It includes the bulk and northern part of the city of Harvard, as well as unincorporated communities: Big Foot Prairie (partly in Wisconsin), Lawrence, and Chemung.
As of the 2020 census, its population was 9,035 and it contained 3,294 housing units.
According to the 2010 census, the township has a total area of, all land.[1]