Cassoday is a city in Butler County, Kansas, United States.

[4] For many millennia, the Great Plains of North America was inhabited by nomadic Native Americans.

In 1803, most of the land for modern day Kansas was acquired by the United States from France as part of the 828,000 square mile Louisiana Purchase for 2.83 cents per acre.

In 1855, Butler County was established within the Kansas Territory, which included the land for modern day Cassoday.

According to the United States Census Bureau, the city has a total area of 0.39 square miles (1.01 km2), all of it land.

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

[10] The 2020 United States census counted 113 people, 43 households, and 29 families in Cassoday.

The racial makeup of the city was 95.3% White, 1.6% African American, 0.8% Asian, 0.8% Pacific Islander, and 1.6% from two or more races.

30.9% of all households were made up of individuals, and 7.2% had someone living alone who was 65 years of age or older.

29.6% of all households were made up of individuals, and 14.8% had someone living alone who was 65 years of age or older.

There were 5.1% of families and 7.8% of the population living below the poverty line, including 19.0% of under eighteens and none of those over 64.

[2] The community is served by Flinthills USD 492 public school district.

[28] K-177 Highway and Southern Transcon main line of BNSF Railway both go through Matfield Green, while the Kansas Turnpike toll road passes immediately north of the city with a toll plaza connected to Cassoday.