Macomb /məˈkoʊm/ is a city in and the county seat of McDonough County, Illinois, United States. It is situated in western Illinois, southwest of Galesburg. The city is about 75 miles southwest of Peoria and 77 miles south of the Quad Cities. A special census held in 2014 placed the city’s population at 21,516. Macomb is the home of Western Illinois University.
Macomb is located at 40°27′38″N 90°40′27″W / 40.46056°N 90.67417°W / 40.46056; -90.67417 (40.460501, -90.674048). The East Fork Lamoine River flows past the northern part of the city.
According to the 2010 census, Macomb has a total area of 11.121 square miles (28.80 km), of which 10.69 square miles (27.69 km) (or 96.12%) is land and 0.431 square miles (1.12 km) (or 3.88%) is water.
As of the census of 2000, there are 18,558 people, 6,575 households, and 2,952 families residing in the city. The population density is 1,884.2 people per square mile (727.4/km²). There are 7,037 housing units at an average density of 714.5 per square mile (275.8/km²). The racial makeup of the city is 88.73% White, 5.93% African American, 3.06% Asian, 0.03% Pacific Islander, 0.69% from other races, and 1.40% from two or more races. 2.10% of the population are Hispanic or Latino of any race.
There were 6,575 households out of which 19.1% had children under the age of 18 living with them, 34.9% were married couples living together, 7.4% had a female householder with no husband present, and 55.1% were non-families. 38.4% of all households were made up of individuals and 12.4% had someone living alone who was 65 years of age or older. The average household size was 2.10 and the average family size was 2.77.
In the city, the population was spread out with 12.6% under the age of 18, 42.9% from 18 to 24, 18.2% from 25 to 44, 14.0% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 23 years. For every 100 females, there were 94.3 males. For every 100 females age 18 and over, there were 93.8 males.
The median income for a household in the city was $25,994, and the median income for a family was $42,069. Males had a median income of $27,663 versus $21,780 for females. The per capita income for the city was $13,470. 29.1% of the population and 12.2% of families were below the poverty line. 22.8% of those under the age of 18 and 8.1% of those 65 and older were living below the poverty line.