Waterloo township
- County:
- Lyon County
- County Seat:
- No
- Area (mi²):
- 59.17
- State:
- Kansas
Waterloo township is located in Lyon County, Kansas. Waterloo township has a 2026 population of 242. Waterloo township is currently growing at a rate of 1.68% annually and its population has increased by 3.42% since the most recent census, which recorded a population of 234 in 2020.
The median age in Waterloo township is 66.2 years: 61.4 years for males, and 68.8 years for females. For every 100 females there are 129.5 males.