Lacon, Illinois

Lacon, Illinois
5th Street, Lacon, view towards the Illinois River
Interactive map of Lacon, Illinois
Lacon
Lacon
Coordinates: 41°1′26″N 89°24′28″W / 41.02389°N 89.40778°W / 41.02389; -89.40778
CountryUnited States
StateIllinois
CountyMarshall
TownshipLacon
Founded1831 as Strawn's Landing
Renamed1831 as Columbia
Renamed1837 as Lacon
Named afterLaconia
Area
 • Total
1.64 sq mi (4.25 km2)
 • Land1.60 sq mi (4.14 km2)
 • Water0.042 sq mi (0.11 km2)
Elevation
505 ft (154 m)
Population
 (2020)
 • Total
1,878
 • Estimate 
(2024)
1,838
 • Density1,173.6/sq mi (453.14/km2)
Time zoneUTC-6 (CST)
 • Summer (DST)UTC-5 (CDT)
ZIP code
61540
Area code309
FIPS code17-40559
GNIS feature ID2395578
Websitelaconcity.com

Lacon is a city in and the county seat of Marshall County, Illinois, United States. It is part of the Peoria metropolitan area. The population was 1,878 at the 2020 census, down from 1,937 in 2010.