Birch Lake township
- County:
- Cass County
- County Seat:
- No
- Area (mi²):
- 28.624
- State:
- Minnesota
Birch Lake township is located in Cass County, Minnesota. Birch Lake township has a 2026 population of 593. Birch Lake township is currently declining at a rate of 0% annually and its population has increased by 4.22% since the most recent census, which recorded a population of 569 in 2020.
The median household income in Birch Lake township is $61,136 with a poverty rate of 11.34%. The median age in Birch Lake township is 61.1 years: 60 years for males, and 62 years for females. For every 100 females there are 103.5 males.