Walnut Township is a township in Cowley County, Kansas, United States.

Walnut Township covers an area of 34.36 square miles (89.0 km2) and surrounds the northern and eastern sides of the city of Winfield.

According to the USGS, it contains one cemetery, Cowley.

The streams of Black Crook Creek, Cedar Creek, East Badger Creek, Lone Elm Creek, Timber Creek and West Badger Creek run through this township.

This article about a location in Cowley County, Kansas is a stub.