Washington township
- County:
- Tazewell County
- County Seat:
- No
- Area (mi²):
- 35.577
- State:
- Illinois
Washington township is located in Tazewell County, Illinois. Washington township has a 2026 population of 313. Washington township is currently declining at a rate of -0.32% annually and its population has decreased by -1.26% since the most recent census, which recorded a population of 317 in 2020.
The median household income in Washington township is $70,673 with a poverty rate of 11.44%. The median age in Washington township is 45.4 years: 43.3 years for males, and 56.2 years for females. For every 100 females there are 98.3 males.