Harrisonville is a city in Cass County, Missouri, United States.

Harrisonville was founded in 1837 upon land donated to Cass County by Congress for county purposes, and was named for Congressman Albert G. Harrison, who was instrumental in obtaining the land grant.

11 (1863), which ordered the depopulation of three entire Missouri counties and part of a fourth.

[8] In 1972, Harrisonville was the site of escalating tensions between a handful of mostly Vietnam veterans and town elders, which culminated in a brief rampage by 25-year-old Charlie "Ootney" Simpson.

In the town square, in plain view of onlookers, he killed two police officers and a bystander before shooting himself.

The victims were officers Donald Marler and Francis Wirt and local businessman Orville Allen.

[10] A May 2017 report from Missouri State Auditor Nicole Galloway gave the city the lowest possible rating of "poor," citing complex, often overlapping tax districts, contracts awarded without appropriate bidding processes and overuse of money pulled from restricted funds.

[13] The 2020 United States census[15] counted 10,121 people, 3,963 households, and 2,368 families in Harrisonville.

Of all households, 33.6% consisted of individuals and 12.2% had someone living alone who was 65 years of age or older.

29.6% of all households were made up of individuals, and 13.9% had someone living alone who was 65 years of age or older.

28.9% of all households were made up of individuals, and 14.0% had someone living alone who was 65 years of age or older.

[20] Intercity bus service to the city is provided by Jefferson Lines.