
Harrisonville
- County:
- Cass County
- County Seat:
- Yes
- Area (mi²):
- 9.883
- State:
- Missouri
Harrisonville is a city located in Cass County, Missouri. Harrisonville has a 2025 population of 9,667. It is also the county seat of Cass County. Harrisonville is currently declining at a rate of -0.94% annually and its population has decreased by -4.56% since the most recent census, which recorded a population of 10,129 in 2020.
The average household income in Harrisonville is $78,851 with a poverty rate of 7.6%. The median age in Harrisonville is 37.8 years: 33.2 years for males, and 44.5 years for females.