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

As of the 2010 census, its population was 980 and it contained 835 housing units.

[2] According to the 2010 census, the township has a total area of 35.57 square miles (92.1 km2), of which 34.72 square miles (89.9 km2) (or 97.61%) is land and 0.85 square miles (2.2 km2) (or 2.39%) is water.

[2] (This list is based on USGS data and may include former settlements.)

The township contains these three cemeteries: Bradford, Myers and Trenton.