
Argonia
- County:
- Sumner County
- County Seat:
- No
- Area (mi²):
- 0.698
- State:
- Kansas
Argonia is a city located in Sumner County, Kansas. Argonia has a 2025 population of 445. Argonia is currently declining at a rate of -0.67% annually and its population has decreased by -3.05% since the most recent census, which recorded a population of 459 in 2020.
The average household income in Argonia is $78,308 with a poverty rate of 7.33%. The median age in Argonia is 45.2 years: 39.2 years for males, and 45.3 years for females.