Illinois · Census place 1716470

Cortland, Illinois

Cortland is a town in DeKalb County, Illinois with an estimated 4,592 residents on July 1, 2024. It is the 348th largest of 651 incorporated places of 1,000+ people in the state.

Population 2024
4,592
#348 of 651 in Illinois
Change since 2020
+4.5%
+196 people
Land area
3.6 sq mi
Density
1,279 / sq mi
State median 2,177
Orange pin: Cortland. Shaded: its county. Dark pin: Springfield.

Measure from here

Tools and pages that start from Cortland

Cortland population, 2020 to 2024

Cortland added 196 residents from July 2020 to July 2024, a change of +4.5%. In the latest year it moved by +92.

4,39620204,41120214,45220224,50020234,5922024
July 1 estimates. The April 2020 estimates base was 4,401. The axis starts above zero so yearly changes are visible.

Cortland covers 3.59 square miles of land, for 1,279 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Cortland is less dense than the typical town.

What county Cortland is in

All of Cortland's residents live in DeKalb County, which had 101,335 residents in 2024. Cortland holds 4.5% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Cortland

2 ZIP Code Tabulation Areas (ZCTAs) overlap Cortland by at least 10% of the ZCTA's or the town's land: 60112, 60151. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a town that annexed land after 2020 may reach into ZIP codes not listed here.

Where Cortland is

The Census internal point of Cortland is at 41.937200, -88.689300. Springfield, the capital, is 157.2 miles SSW in a straight line. The nearest larger place is DeKalb, IL (40,491 people), 3.0 miles away. The nearest city of 100,000 or more is Elgin, IL, 19.9 miles away.

Internal point

Decimal
41.937200, -88.689300
DMS
41°56'13.92"N 88°41'21.48"W
UTM
16N 359956.5E 4644183.6N
Geohash
dp2ytf6mv
Plus code
86HHW8P6+V7

Daylight in Cortland

At 41.94° N, Cortland gets about 15 h 14 min of daylight around the June solstice and 9 h 07 min around the December solstice, a swing of 6 h 07 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Cortland

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is DeKalb, 3.1 miles away, with 40,491 people.

Questions people ask

What is the population of Cortland, IL?

4,592 on July 1, 2024, in the Census Vintage 2024 estimates. That is up 196 (4.5%) from 4,396 in July 2020.

What county is Cortland in?

DeKalb County. All of its residents live in that county.

What ZIP codes cover Cortland?

2 ZIP Code Tabulation Areas overlap it by at least 10% of either area: 60112, 60151.

How far is Cortland from Springfield?

157.2 miles (253.0 km) in a straight line, heading SSW from Cortland.

What is the nearest larger city to Cortland?

DeKalb, IL, with 40,491 residents, 3.0 miles away between internal points.

Sources and data as of

Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.

  1. 01Census Vintage 2024 subcounty population estimates
  2. 02Census 2024 Gazetteer, places
  3. 03Census 2020 ZCTA to place relationship file
  4. 04Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.