Oglesby, Illinois

Oglesby
City of Oglesby
City water tower
Location of Oglesby in LaSalle County, Illinois.
Coordinates: 41°17′36″N 89°04′16″W / 41.29333°N 89.07111°W / 41.29333; -89.07111
CountryUnited States
StateIllinois
CountyLaSalle
TownshipLaSalle
First settled1865
Incorporated1902 as Portland
Renamed1913 as Oglesby
Government
 • TypeCity commission government
 • MayorJason Curran
Area
 • Total
4.99 sq mi (12.93 km2)
 • Land4.99 sq mi (12.93 km2)
 • Water0 sq mi (0.00 km2)
Elevation
633 ft (193 m)
Population
 (2020)
 • Total
3,712
 • Estimate 
(2024)
3,626
 • Density743.6/sq mi (287.11/km2)
Time zoneUTC−6 (CST)
 • Summer (DST)UTC−5 (CDT)
ZIP code
61348
Area code815
FIPS code17-55353
GNIS feature ID2395310
Websitewww.oglesby.il.us

Oglesby is a city in LaSalle County, Illinois, United States. The population was 3,712 at the 2020 census, down from 3,791 at the 2010 census. It is part of the Ottawa Micropolitan Statistical Area.