Allison township is located in Lawrence County, Illinois. Allison township has a 2026 population of 252. Allison township is currently declining at a rate of -0.79% annually and its population has decreased by -1.95% since the most recent census, which recorded a population of 257 in 2020.
The median household income in Allison township is $54,195 with a poverty rate of 0%. The median age in Allison township is 30.7 years: 30.6 years for males, and 57.4 years for females. For every 100 females there are 248.6 males.