Denison township
- County:
- Lawrence County
- County Seat:
- No
- Area (mi²):
- 57.901
- State:
- Illinois
Denison township is located in Lawrence County, Illinois. Denison township has a 2026 population of 1,255. Denison township is currently declining at a rate of -1.65% annually and its population has decreased by -7.45% since the most recent census, which recorded a population of 1,356 in 2020.
The median household income in Denison township is $70,833 with a poverty rate of 4.83%. The median age in Denison township is 35 years: 29.2 years for males, and 40.5 years for females. For every 100 females there are 100.5 males.