| Official Name: | Sedan Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Chautauqua |
| Area Total Km2: | 129.02 |
| Area Land Km2: | 128.18 |
| Area Water Km2: | 0.84 |
| Area Total Sq Mi: | 49.82 |
| Area Land Sq Mi: | 49.49 |
| Area Water Sq Mi: | 0.32 |
| Area Water Percent: | 0.65 |
| Population As Of: | 2000 |
| Population Total: | 1660 |
| Population Density Km2: | 13 |
| Population Density Sq Mi: | 33.5 |
| Elevation M: | 277 |
| Elevation Ft: | 909 |
| Coordinates: | 37.1511°N -96.1722°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0469154 |
Sedan Township is a township in Chautauqua County, Kansas, USA. As of the 2000 census, its population was 1,660.
Sedan Township covers an area of 49.82sqmi and contains one incorporated settlement, Sedan (the county seat). The streams of Deer Creek, Fly Creek and Wolf Creek run through this township. According to the United States Geological Survey, it contains two cemeteries: Casement and Greenwood.
Sedan Township contains one airport, Sedan City Airport.