Demographics & People — Cortland, Illinois

Population Overview

Population (Census)4,556
Estimated 2026~4,600
Median Age31.5
Total Households1,577
Family Households1,105
Average Household Size2.89
Diversity Index0.4232 (moderately diverse)

Race & Ethnicity

White3,435
Black or African American450
Asian0
Hispanic or Latino795

Heritage & Ancestry

GroupCount
Other groups1,312
German1,240
Hispanic: Hispanic or Latino769
Unclassified or not reported724
Irish715
Polish488
Hispanic: South American327
Hispanic: Mexican318
Hispanic: Colombian282
English277

Language

English Only3,912
Spanish325
Population 5+4,271

Veterans

Veterans163
Population 18+3,636

Commuting

Mean Commute Time25.5 minutes
Work from Home9.6%
Commuter ProfileN/A
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Cortland, Illinois.