Johnson township
- County:
- Clark County
- County Seat:
- No
- Area (mi²):
- 36.467
- State:
- Illinois
Johnson township is located in Clark County, Illinois. Johnson township has a 2026 population of 363. Johnson township is currently declining at a rate of -1.36% annually and its population has decreased by -2.68% since the most recent census, which recorded a population of 373 in 2020.
The median household income in Johnson township is $75,625 with a poverty rate of 10.26%. The median age in Johnson township is 34.1 years: 18 years for males, and 38.4 years for females. For every 100 females there are 78.7 males.