Current State Atlas

Illinois

United States of America

State

Population
12.7M
Land Area
55,513.5 sq mi
County Pages
102

County Map

Click a county to open its page.

Illinois Counties – Terra Firma

102 clickable counties

Current Snapshot

Population
12,710,158
Households
5,105,448
Housing Units
5,482,133
Median Age
39.4 years
Density
229.0 / sq mi
County Pages
102

Population and Housing

MeasureValueSourceVintageStatus
Population 12,710,158 ACS 1-Year 2024 Available
Households 5,105,448 ACS 1-Year 2024 Available
Housing Units 5,482,133 ACS 1-Year 2024 Available
Median Age 39.4 years ACS 1-Year 2024 Available
Population Density 229.0 / sq mi ACS 1-Year 2024 Available

Income and Economy

MeasureValueSourceVintageStatus
Median Household Income $83,211 ACS 1-Year 2024 Available
Per Capita Income $46,937 ACS 1-Year 2024 Available
GDP $1.2T BEA Downloaded current release Available
Real GDP Change +1.6% BEA Downloaded current release Available
Personal Income $989.2B BEA Downloaded current release Available
Personal Income Per Capita $77,772 BEA Downloaded current release Available

Labor

MeasureValueSourceVintageStatus
Labor Force Unavailable BLS 2025 annual average requested on 2026-04-10 NoMetrics
BLS public access was unavailable from this environment during this build; labor metrics were left null.
Employment Unavailable BLS 2025 annual average requested on 2026-04-10 NoMetrics
BLS public access was unavailable from this environment during this build; labor metrics were left null.
Unemployment Unavailable BLS 2025 annual average requested on 2026-04-10 NoMetrics
BLS public access was unavailable from this environment during this build; labor metrics were left null.
Unemployment Rate Unavailable BLS 2025 annual average requested on 2026-04-10 NoMetrics
BLS public access was unavailable from this environment during this build; labor metrics were left null.

Land and Relief

MeasureValueSourceVintageStatus
Land Area 55,513.5 sq mi Gazetteer 2025 Available
Water Area 2,399.8 sq mi Gazetteer 2025 Available
Water Share 4.1% Gazetteer 2025 Available
Minimum Elevation 82 ft USGS 3DEP Requested on 2026-04-10 Available
Mean Elevation 625 ft USGS 3DEP Requested on 2026-04-10 Available
Maximum Elevation 1,210 ft USGS 3DEP Requested on 2026-04-10 Available

Source Ledger

SourceFamilyVintageCoverageLoadLink
2025 Gazetteer States Gazetteer 2025 Present Loaded Open
TIGER/Line States TIGER/Line 2025 Present Loaded Open
ACS 2024 1-year ACS 1-Year 2024 Present Loaded Open
BEA State GDP and Income BEA Downloaded current release Present Loaded Open
BLS LAUS BLS 2025 annual average requested on 2026-04-10 NoMetrics Loaded Open
BLS public access was unavailable from this environment during this build; labor metrics were left null.
USGS 3DEP USGS 3DEP Requested on 2026-04-10 Present Loaded Open

County Pages

102 pages

Provenance

MeasureValueSourceVintageStatus
USPS IL Gazetteer 2025 Gazetteer Available
FIPS 17 Gazetteer 2025 Gazetteer Available
GEOID 0400000US17 Gazetteer 2025 Gazetteer Available
Internal Point Latitude 40.102875 Gazetteer 2025 Gazetteer Available
Internal Point Longitude -89.152611 Gazetteer 2025 Gazetteer Available
Last Built 2026-04-11 03:01 UTC Linea State Current build Available
Canonical Vintage 2025 Gazetteer Gazetteer 2025 Gazetteer Available
Geometry Vintage TIGER/Line 2025 TIGER/Line TIGER/Line 2025 Available
ACS Vintage ACS 2024 1-year ACS 1-Year ACS 2024 1-year Available
BEA Vintage BEA state release current as downloaded BEA BEA state release current as downloaded Available
BLS Vintage BLS LAUS 2025 annual average BLS BLS LAUS 2025 annual average Available
USGS Vintage USGS 3DEP requested on 2026-04-10 USGS 3DEP USGS 3DEP requested on 2026-04-10 Available