Millbrook township
- County:
- Kendall County
- County Seat:
- No
- Area (mi²):
- 36.535
- State:
- Illinois
Millbrook township is located in Kendall County, Illinois. Millbrook township has a 2026 population of 400. Millbrook township is currently growing at a rate of 0.5% annually but its population has decreased by -1.48% since the most recent census, which recorded a population of 406 in 2020.
The median household income in Millbrook township is $65,000 with a poverty rate of 7.67%. The median age in Millbrook township is 56.6 years: 57.5 years for males, and 54.9 years for females. For every 100 females there are 94.2 males.