Black River township is located in Pennington County, Minnesota. Black River township has a 2026 population of 63. Black River township is currently declining at a rate of -1.56% annually and its population has decreased by -5.97% since the most recent census, which recorded a population of 67 in 2020.
The median household income in Black River township is $71,250 with a poverty rate of 3.45%. The median age in Black River township is 61.5 years: 64.7 years for males, and 43.5 years for females. For every 100 females there are 70.6 males.