County demographics · Kentucky
Jefferson County, Kentucky demographics
Jefferson County, Kentucky (county FIPS 21111) has a median household income of $69,866 (±$1,228) and a total population of 783,022 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. 43 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 | 783,022 | none (controlled estimate) | B01003 |
| Median age | 38.4 years | ±0.2 years | B01002 |
| Households | 331,554 | ±1,638 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $69,866 | ±$1,228 | B19013 |
| Median value of owner-occupied housing units | $248,400 | ±$2,496 | B25077 |
| Median gross rent | $1,149 | ±$13 | B25064 |
| Owner-occupied share of occupied housing units | 62.1% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 37.9% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 91.3% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 37% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 14.3% | 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 | 21111 |
| Land area | 380.83 sq mi |
| Water area | 16.77 sq mi |
| Population density | 2,056 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 |
|---|---|---|---|
| 40299 | 14.1% | 99.4% | Yes |
| 40272 | 8.4% | 95.6% | Yes |
| 40245 | 6.2% | 72.2% | Yes |
| 40291 | 5.9% | 100% | Yes |
| 40216 | 4.1% | 100% | Yes |
| 40118 | 3.9% | 100% | Yes |
| 40214 | 3.9% | 100% | Yes |
| 40219 | 3.9% | 100% | Yes |
| 40023 | 3.8% | 59.8% | Yes |
| 40241 | 3.4% | 97.8% | Yes |
| 40229 | 3.2% | 70.4% | Yes |
| 40223 | 3.2% | 100% | Yes |
| 40207 | 3.1% | 100% | Yes |
| 40258 | 3.1% | 100% | Yes |
| 40059 | 2.9% | 39.3% | |
| 40213 | 2.5% | 100% | Yes |
| 40222 | 2.5% | 100% | Yes |
| 40218 | 2.4% | 100% | Yes |
| 40228 | 2.3% | 100% | Yes |
| 40220 | 2% | 100% | Yes |
| 40211 | 1.9% | 100% | Yes |
| 40205 | 1.8% | 100% | Yes |
| 40206 | 1.5% | 100% | Yes |
| 40209 | 1.1% | 100% | Yes |
| 40243 | 1.1% | 100% | Yes |
| 40212 | 1% | 100% | Yes |
| 40215 | 0.9% | 100% | Yes |
| 40210 | 0.8% | 100% | Yes |
| 40204 | 0.8% | 100% | Yes |
| 40203 | 0.8% | 100% | Yes |
| 40242 | 0.8% | 100% | Yes |
| 40208 | 0.7% | 100% | Yes |
| 40217 | 0.6% | 100% | Yes |
| 40202 | 0.4% | 100% | Yes |
| 40025 | 0.3% | 100% | Yes |
| 40177 | 0.3% | 7.2% | |
| 40109 | 0.1% | 3% | |
| 40221 | 0% | 100% | Yes |
| 40041 | 0% | 100% | Yes |
| 40047 | 0% | 0.4% | |
| 40280 | 0% | 100% | Yes |
| 40231 | 0% | 100% | Yes |
| 40014 | 0% | 0% |
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:111&in=state:21
- 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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curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/counties/21111" -H "X-API-Key: $OLYMPUS_API_KEY"get_us_demographics {"county_fips":"21111"}