Lynn Township is one of twenty-one townships in Knox County, Illinois, USA.

As of the 2010 census, its population was 309 and it contained 171 housing units.

[2] According to the 2010 census, the township has a total area of 35.36 square miles (91.6 km2), of which 35.31 square miles (91.5 km2) (or 99.86%) is land and 0.05 square miles (0.13 km2) (or 0.14%) is water.

[2] The township contains these two cemeteries: Fraker and Galva.