| Official Name: | Copley Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Knox County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Knox County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Knox |
| Established Title: | Established |
| Established Date: | November 2, 1852 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 35.47 |
| Area Land Sq Mi: | 35.04 |
| Area Water Sq Mi: | 0.43 |
| Area Water Percent: | 1.21 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 9.9 |
| Elevation M: | 247 |
| Elevation Ft: | 810 |
| Coordinates: | 41.0192°N -90.1556°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 61414, 61428, 61448, 61467, 61485 |
| Blank Name: | FIPS code |
| Blank Info: | 17-095-16275 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 337 |
Copley Township is one of twenty-one townships in Knox County, Illinois, USA. As of the 2010 census, its population was 348 and it contained 235 housing units.[2] In the 1850 report, the township was named Prince Albert Township. It was later named Richfield Township, and the name was changed to Copley Township on June 8, 1853.
According to the 2010 census, the township has a total area of, of which (or 98.79%) is land and (or 1.21%) is water.[2]
The township contains these four cemeteries: Martin, Old Scotch, Smith and Westfall.