Overisel Township, Michigan
| Overisel Township, Michigan | |
|---|---|
| Overisel Township in 2023 | |
| Coordinates: 42°43′6″N 85°57′47″W / 42.71833°N 85.96306°W | |
| Country | United States | 
| State | Michigan | 
| County | Allegan | 
| Area | |
|  • Total | 35.7 sq mi (92.5 km2) | 
| • Land | 35.6 sq mi (92.3 km2) | 
| • Water | 0.08 sq mi (0.2 km2) | 
| Elevation | 659 ft (201 m) | 
| Population  (2020) | |
|  • Total | 3,113 | 
| • Density | 87.9/sq mi (33.94/km2) | 
| Time zone | UTC-5 (Eastern (EST)) | 
| • Summer (DST) | UTC-4 (EDT) | 
| FIPS code | 26-61820 | 
| GNIS feature ID | 1626872 | 
| Website | www | 
Overisel Township is a civil township of Allegan County in the U.S. state of Michigan. The population was 3,113 at the 2020 census.
Overisel was named after the Dutch province of Overijssel. Overisel is the birthplace of mathematician George David Birkhoff, best known for what is now called the ergodic theorem.