
Leyden township
- County:
- Cook County
- County Seat:
- No
- Area (mi²):
- 19.924
- State:
- Illinois
Leyden township is located in Cook County, Illinois. Leyden township has a 2025 population of 87,756. Leyden township is currently declining at a rate of -0.82% annually and its population has decreased by -5.39% since the most recent census, which recorded a population of 92,760 in 2020.
The average household income in Leyden township is $94,304 with a poverty rate of 8.17%. The median age in Leyden township is 38.3 years: 37.2 years for males, and 39.2 years for females.