Allen township
- County:
- Lyon County
- County Seat:
- No
- Area (mi²):
- 34.816
- State:
- Kansas
Allen township is located in Lyon County, Kansas. Allen township has a 2026 population of 15. Allen township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 15 in 2020.