
Dorchester township
- County:
- Macoupin County
- County Seat:
- No
- Area (mi²):
- 35.979
- State:
- Illinois
Dorchester township is located in Macoupin County, Illinois. Dorchester township has a 2025 population of 1,455. Dorchester township is currently declining at a rate of -0.41% annually and its population has decreased by -2.87% since the most recent census, which recorded a population of 1,498 in 2020.
The average household income in Dorchester township is $88,259 with a poverty rate of 6.19%. The median age in Dorchester township is 38.3 years: 39.1 years for males, and 37.6 years for females.