
Allin township
- County:
- McLean County
- County Seat:
- No
- Area (mi²):
- 36.242
- State:
- Illinois
Allin township is located in McLean County, Illinois. Allin township has a 2025 population of 822. Allin township is currently declining at a rate of -1.08% annually and its population has decreased by -3.75% since the most recent census, which recorded a population of 854 in 2020.
The average household income in Allin township is $84,977 with a poverty rate of 8.42%. The median age in Allin township is 41.7 years: 41.5 years for males, and 43.8 years for females.