| Official Name: | Oskaloosa Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Jefferson |
| Area Total Km2: | 149.21 |
| Area Land Km2: | 148.97 |
| Area Water Km2: | 0.25 |
| Area Total Sq Mi: | 57.61 |
| Area Land Sq Mi: | 57.52 |
| Area Water Sq Mi: | 0.1 |
| Area Water Percent: | 0.17 |
| Population As Of: | 2000 |
| Population Total: | 2142 |
| Population Density Km2: | 14.4 |
| Population Density Sq Mi: | 37.2 |
| Elevation M: | 336 |
| Elevation Ft: | 1102 |
| Coordinates: | 39.2161°N -95.3108°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0478346 |
Oskaloosa Township is a township in Jefferson County, Kansas, USA. As of the 2000 census, its population was 2,142.
Oskaloosa Township covers an area of 57.61 square miles (149.21 square kilometers); of this, 0.1 square miles (0.25 square kilometers) or 0.17 percent is water. The streams of Burr Oak Branch, Honey Creek, and Little Buck Creek run through this township.
The township contains two cemeteries: Pleasant View and Plum Grove.