Macomb, Illinois

Macomb, Illinois
Interactive map of Macomb, Illinois
Macomb
Macomb
Coordinates: 40°28′50″N 90°41′51″W / 40.48056°N 90.69750°W / 40.48056; -90.69750
CountryUnited States
StateIllinois
CountyMcDonough
IncorporatedDecember 24, 1830
Named afterAlexander Macomb
Government
 • MayorMichael J. Inman
Area
 • Total
11.03 sq mi (28.57 km2)
 • Land10.60 sq mi (27.46 km2)
 • Water0.43 sq mi (1.12 km2)  3.87%
Elevation
643 ft (196 m)
Population
 (2020)
 • Total
15,051
 • Estimate 
(2024)
14,765
 • Density1,419.8/sq mi (548.19/km2)
Time zoneUTC-6 (CST)
 • Summer (DST)UTC-5 (CDT)
ZIP Code
61455
Area codes309, 861
FIPS code17-45889
GNIS ID2395801
Websitewww.cityofmacomb.com

Macomb (/məˈkm/) is a city in and the county seat of McDonough County, Illinois, United States. It is situated in western Illinois, about 75 miles (121 km) southwest of Peoria. As of the 2020 census, the population of the city was 15,051. Macomb is the home of Western Illinois University.