Lyon township
- County:
- Geary County
- County Seat:
- No
- Area (mi²):
- 43.247
- State:
- Kansas
Lyon township is located in Geary County, Kansas. Lyon township has a 2026 population of 271. Lyon township is currently growing at a rate of 1.12% annually but its population has decreased by -3.21% since the most recent census, which recorded a population of 280 in 2020.
The median household income in Lyon township is $132,727 with a poverty rate of 0%. The median age in Lyon township is 35.7 years: 35.3 years for males, and 41.4 years for females. For every 100 females there are 205.6 males.