North Henderson township
- County:
- Mercer County
- County Seat:
- No
- Area (mi²):
- 34.996
- State:
- Illinois
North Henderson township is located in Mercer County, Illinois. North Henderson township has a 2026 population of 378. North Henderson township is currently declining at a rate of -1.31% annually and its population has decreased by -2.07% since the most recent census, which recorded a population of 386 in 2020.
The median household income in North Henderson township is $73,167 with a poverty rate of 0%. The median age in North Henderson township is 37.8 years: 29.4 years for males, and 41.8 years for females. For every 100 females there are 191.1 males.