Walnut is a city in Crawford County, Kansas, United States.

Prior to April, 1877, the post office's name was officially called Walnut Station.

[7] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

29.8% of all households were made up of individuals, and 7.2% had someone living alone who was 65 years of age or older.

There were 116 housing units at an average density of 117.1 per square mile (45.2/km2).

36.3% of all households were made up of individuals, and 16.5% had someone living alone who was 65 years of age or older.

About 3.3% of families and 10.6% of the population were below the poverty line, including none of those under the age of eighteen and 25.0% of those 65 or over.