Sherman is a city located in Sangamon County Illinois. With a 2020 population of 4,655, it is the 344th largest city in Illinois and the 4965th largest city in the United States . Sherman is currently declining at a rate of -0.26% annually but its population has increased by 12.22% since the most recent census, which recorded a population of 4,148 in 2010. Sherman reached it's highest population of 4,713 in 2017. Spanning over 3 miles, Sherman has a population density of 1,485 people per square mile.
The average household income in Sherman is $122,320 with a poverty rate of 1.59%. The median rental costs in recent years comes to $928 per month, and the median house value is $244,300. The median age in Sherman is 44.7 years, 40.7 years for males, and 49 years for females.