Northern township
- County:
- Franklin County
- County Seat:
- No
- Area (mi²):
- 36.473
- State:
- Illinois
Northern township is located in Franklin County, Illinois. Northern township has a 2026 population of 445. Northern township is currently declining at a rate of -0.22% annually and its population has decreased by -2.2% since the most recent census, which recorded a population of 455 in 2020.
The median household income in Northern township is $81,719 with a poverty rate of 6.62%. The median age in Northern township is 42.4 years: 41.5 years for males, and 46 years for females. For every 100 females there are 164.2 males.