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This list of settlements in Ogle County, Illinois, United States, contains the names of incorporated cities in villages in the county, as well as unincorporated communities.

Current communities

Name	Type	Township	Area in miles (km²)	Date founded	Population
Adeline	Village	Maryland Township	0.7 mi² (1.81 km²)		139
Baileyville	Unincorporated	Forreston Township
Brooks Isle	Unincorporated	Oregon-Nashua Township
Buffalo Grove	Unincorporated	Oregon-Nashua Township	NA	1830	NA
Byron	City	Byron Township	6.4 mi² (16.58 km²)		2,917
Chana	Unincorporated	Pine Rock Township		1871
Creston	Village	Dement Township	1.1 mi² (2.85 km²)		543
Davis Junction	Village	Scott Township	9.8 mi² (25.38 km²)		491
Daysville	Unincorporated	Oregon-Nashua Township
Egan	Unincorporated	Leaf River Township
Flagg Center	Unincorporated	Flagg Township
Forreston	Village	Forreston Township	2.1 mi² (5.44 km²)	1854^[1]	1,469
Grand Detour	Unincorporated	Grand Detour Township
Haldane	Unincorporated	Lincoln Township
Harper	Unincorporated	Forreston Township
Hazelhurst	Unincorporated	Eagle Point Township
Hillcrest	Village	Flagg Township	0.6 mi² (1.55 km²)		1,158
Holcomb	Unincorporated	White Rock Township
Kings	Unincorporated	White Rock Township
Leaf River	Village	Leaf River Township	2.2 mi² (5.7 km²)		555
Lindenwood	Unincorporated	Lynnville Township
Monroe Center	Village	Monroe Township			504
Mount Morris	Village	Mt. Morris Township	3.0 mi² (7.77 km²)		3,013
Oregon	City	Oregon-Nashua Township	2.1 mi² (5.44 km²)		4,060
Paynes Point	Unincorporated	Pine Rock Township
Polo	City	Buffalo Township	3.4 mi² (8.81 km²)		2,477
Rochelle	City	Flagg Township and Dement Township	19.4 mi² (50.25 km²)		9,424
Stillman Valley	Village	Marion Township	1.4 mi² (3.63 km²)	1875	1,048
Stratford	Unincorporated	Pine Creek Township
Woosung	Unincorporated	Woosung Township		June, 1855^[2]