Posen township is located in Yellow Medicine County, Minnesota. Posen township has a 2026 population of 219. Posen township is currently declining at a rate of -1.35% annually and its population has decreased by -1.35% since the most recent census, which recorded a population of 222 in 2020.
The median household income in Posen township is $131,875 with a poverty rate of 3.19%. The median age in Posen township is 39.2 years: 37.8 years for males, and 39.8 years for females. For every 100 females there are 105.8 males.