Willis is a city in Brown County, Kansas, United States.

[4] A post office opened in Willis in 1882 and remained in operation until it was discontinued in 1960.

[5] According to the United States Census Bureau, the city has a total area of 0.17 square miles (0.44 km2), all land.

13.6% of all households were made up of individuals, and 4.5% had someone living alone who was 65 years of age or older.

There were no families and 4.8% of the population living below the poverty line, including no under eighteens and none of those over 64.

The racial makeup of the city was 92.1% White, 2.6% Native American, and 5.3% from two or more races.

31.6% of all households were made up of individuals, and 5.3% had someone living alone who was 65 years of age or older.