Macomb is a city located in Illinois. With a 2020 population of 16,967, it is the 150th largest city in Illinois and the 2104th largest city in the United States. Macomb is currently declining at a rate of -1.71% annually and its population has decreased by -12.03% since the most recent census, which recorded a population of 19,288 in 2010. Macomb reached it's highest population of 19,952 in 1990. Spanning over 11 miles, Macomb has a population density of 1,566 people per square mile.
The average household income in Macomb is $55,428 with a poverty rate of 30.48%. The median rental costs in recent years comes to $656 per month, and the median house value is $104,700. The median age in Macomb is 26.1 years, 24.5 years for males, and 28.3 years for females. For every 100 females there are 88.1 males.