|— Township —|
Location in Chautauqua County
|- Total||49.82 sq mi (129.02 km2)|
|- Land||49.49 sq mi (128.18 km2)|
|- Water||0.32 sq mi (0.84 km2) 0.65%|
|Elevation||909 ft (277 m)|
|- Density||33.5/sq mi (13/km2)|
|GNIS feature ID||0469154|
Sedan Township covers an area of 49.82 square miles (129.0 km2) and contains one incorporated settlement, Sedan (the county seat). According to the USGS, it contains two cemeteries: Casement and Greenwood.
The streams of Deer Creek, Fly Creek and Wolf Creek run through this township.
Sedan Township contains one airport or landing strip, Sedan City Airport.