| Official Name: | Cottage Grove 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: | 96.5 |
| Area Land Km2: | 95.6 |
| Area Water Km2: | 0.9 |
| Area Water Percent: | 1.0 |
| Population As Of: | 2010 |
| Population Total: | 246 |
| Population Density Km2: | 2.6 |
| Elevation M: | 318 |
| Elevation Ft: | 1043 |
| Coordinates: | 37.7694°N -95.3239°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0474731 |
Cottage Grove Township is one of twelve townships in Allen County, Kansas, United States. As of the 2010 census, its population was 246.[1]
Cottage Grove Township covers an area of 96.5km2 and contains no incorporated settlements. According to the USGS, it contains two cemeteries: Kerns and Saint Peters.
The streams of Coal Creek, Goose Creek and Rocky Branch run through this township.