Demographics & People — Quincy, Illinois

Population Overview

Population (Census)39,188
Estimated 2026~38,900
Median Age39.7
Total Households17,451
Family Households9,128
Average Household Size2.16
Diversity Index0.1681 (relatively homogeneous)

Race & Ethnicity

White34,181
Black or African American2,045
Asian404
Hispanic or Latino929

Heritage & Ancestry

GroupCount
German13,257
Unclassified or not reported12,617
Other groups5,211
Irish4,152
English3,173
American2,548
Hispanic: Hispanic or Latino750
Scottish727
Italian689
Hispanic: Mexican583

Language

English Only35,684
Spanish585
Population 5+36,913

Veterans

Veterans2,690
Population 18+31,126

Commuting

Mean Commute Time13.6 minutes
Work from Home8.0%
Commuter ProfileN/A
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Quincy, Illinois.