Lake County, Illinois demographics
Lake County, Illinois (county FIPS 17097) has a median household income of $110,416 (±$1,747) and a total population of 714,223 in the American Community Survey 5-year estimates for 2020-2024.
Margins of error are at the 90% confidence level. The figures describe 2020-2024 (dollars in 2024 dollars), not the present. 36 ZIP Code Tabulation Areas overlap the county (Census 2020).
Data as of Oct 22, 2026 (Olympus publication) · Markdown version
- Values are ACS 5-year estimates for 2020-2024 (dollars in 2024 dollars), not current figures.
- ZCTA-county overlaps come from the Census 2020 relationship file and use 2020 counties, by land area; Connecticut uses its legacy counties, not the planning regions in ACS 2022+.
ACS 5-year estimates, 2020-2024
Census American Community Survey 5-year estimates for 2020-2024, with 90% margins of error as published by the Census Bureau.
| Metric | Estimate | Margin of error (90%) | ACS table |
|---|---|---|---|
| Total population | 714,223 | none (controlled estimate) | B01003 |
| Median age | 39.1 years | ±0.2 years | B01002 |
| Households | 258,455 | ±1,007 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $110,416 | ±$1,747 | B19013 |
| Median value of owner-occupied housing units | $345,700 | ±$3,502 | B25077 |
| Median gross rent | $1,477 | ±$29 | B25064 |
| Owner-occupied share of occupied housing units | 74.8% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 25.2% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 90.6% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 47.7% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 8.3% | none (derived from several estimates) | B17001 (derived) |
| Unemployment rate (civilian labor force) | 5.2% | none (derived from several estimates) | B23025 (derived) |
- Dollar values are in 2024 inflation-adjusted dollars.
- Percentages' margins of error are in percentage points (pp).
Geography
| Measure | Value |
|---|---|
| County FIPS | 17097 |
| Land area | 443.68 sq mi |
| Water area | 924.65 sq mi |
| Population density | 1,610 per sq mi of land |
| Geography vintage | 2024 Gazetteer |
ZIP codes (ZCTAs) in this county
ZCTAs that overlap the county in the Census 2020 ZCTA to county relationship file, largest share of the county's land first.
| ZCTA | Share of county land | Share of ZCTA land | County is the ZCTA's primary county |
|---|---|---|---|
| 60047 | 7.9% | 100% | Yes |
| 60002 | 7.5% | 100% | Yes |
| 60048 | 6.4% | 100% | Yes |
| 60010 | 6.4% | 38.1% | |
| 60030 | 6% | 100% | Yes |
| 60083 | 5.9% | 100% | Yes |
| 60060 | 5.2% | 100% | Yes |
| 60046 | 5.2% | 100% | Yes |
| 60099 | 5.1% | 100% | Yes |
| 60045 | 4.8% | 100% | Yes |
| 60031 | 4.3% | 100% | Yes |
| 60073 | 4.2% | 100% | Yes |
| 60085 | 3.3% | 100% | Yes |
| 60084 | 3.2% | 100% | Yes |
| 60015 | 3% | 96.2% | Yes |
| 60087 | 2.9% | 100% | Yes |
| 60035 | 2.9% | 100% | Yes |
| 60041 | 2.2% | 100% | Yes |
| 60061 | 1.9% | 100% | Yes |
| 60089 | 1.7% | 78.4% | Yes |
| 60044 | 1.5% | 100% | Yes |
| 60051 | 1.4% | 18.4% | |
| 60069 | 1.3% | 100% | Yes |
| 60064 | 1.2% | 100% | Yes |
| 60096 | 1.1% | 100% | Yes |
| 60020 | 1.1% | 99.1% | Yes |
| 60081 | 0.8% | 18.4% | |
| 60042 | 0.6% | 53.8% | Yes |
| 60088 | 0.5% | 100% | Yes |
| 60013 | 0.3% | 8.9% | |
| 60040 | 0.2% | 100% | Yes |
| 60074 | 0.1% | 5.3% | |
| 60075 | 0% | 100% | Yes |
| 60021 | 0% | 6.2% | |
| 60050 | 0% | 0.4% | |
| 60090 | 0% | 0.5% |
Sources
- American Community Survey 5-year estimates (Census Data API) — U.S. Census Bureau. ACS 5-year 2020-2024 (release acs5-2024:county), source date 2025-09-02. https://api.census.gov/data/2024/acs/acs5?get=NAME,B01003_001E,B01003_001M,B01002_001E,B01002_001M,B11001_001E,B11001_001M,B19013_001E,B19013_001M,B25077_001E,B25077_001M,B25064_001E,B25064_001M,B25003_001E,B25003_002E,B25003_003E,B15003_001E,B15003_017E,B15003_018E,B15003_019E,B15003_020E,B15003_021E,B15003_022E,B15003_023E,B15003_024E,B15003_025E,B17001_001E,B17001_002E,B23025_003E,B23025_005E&for=county:097&in=state:17
- Published by Olympus on Oct 22, 2026.
- Source data: U.S. Census Bureau. Works of the U.S. government are not subject to copyright in the United States.
- This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
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