| Official Name: | Osage Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Allen |
| Area Total Km2: | 124.9 |
| Area Land Km2: | 124.0 |
| Area Water Km2: | 0.9 |
| Area Water Percent: | 0.7 |
| Population As Of: | 2010 |
| Population Total: | 258 |
| Population Density Km2: | 2.1 |
| Elevation M: | 313 |
| Elevation Ft: | 1027 |
| Coordinates: | 37.9944°N -95.1517°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0478140 |
Osage Township is one of twelve townships in Allen County, Kansas, United States. As of the 2010 census, its population was 258.[1]
Osage Township covers an area of 124.9km2 and contains one incorporated settlement, Mildred. According to the USGS, it contains one cemetery, Osage.
The streams of Coal Creek, Middle Fork Little Osage River and North Fork Little Osage River run through this township.