
Casco township
- County:
- St. Clair County
- County Seat:
- No
- Area (mi²):
- 36.881
- State:
- Michigan
Casco township is located in St. Clair County, Michigan. Casco township has a 2025 population of 4,009. Casco township is currently growing at a rate of 0.07% annually and its population has increased by 0.33% since the most recent census, which recorded a population of 3,996 in 2020.
The average household income in Casco township is $103,078 with a poverty rate of 5.84%. The median age in Casco township is 39.6 years: 34.1 years for males, and 42.3 years for females.