| Unit Pref: | Imperial |
| Settlement Type: | Township |
| Official Name: | Harrison Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Winnebago |
| Leader Title: | Supervisor |
| Leader Name: | Steven Wilke[1] |
| Established Title: | Established |
| Area Total Sq Mi: | 24.73 |
| Area Land Sq Mi: | 24.61 |
| Area Water Sq Mi: | 0.12 |
| Area Water Percent: | 0.49 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 27.2 |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Coordinates: | 42.4097°N -89.2311°W |
| Elevation Ft: | 794 |
| Footnotes: | Sources:[2] |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [3] |
| Population Est: | 651 |
| Blank Name: | FIPS code |
| Blank Info: | 17-201-33188 |
Harrison Township is located in Winnebago County, Illinois. As of the 2010 census, its population was 670 and it contained 273 housing units.[4]
According to the 2010 census, the township has a total area of, of which (or 99.51%) is land and (or 0.49%) is water.[4]