
Garrett township
- County:
- Douglas County
- County Seat:
- No
- Area (mi²):
- 52.195
- State:
- Illinois
Garrett township is located in Douglas County, Illinois. Garrett township has a 2025 population of 1,298. Garrett township is currently declining at a rate of -0.46% annually and its population has decreased by -1.82% since the most recent census, which recorded a population of 1,322 in 2020.
The average household income in Garrett township is $88,152 with a poverty rate of 4.83%. The median age in Garrett township is 45.2 years: 44.4 years for males, and 46.3 years for females.