ZIP Code Tabulation Area · Kentucky

ZIP Code 40023: Louisville/Jefferson County, KY

ZIP Code 40023 (Louisville/Jefferson County, Jefferson County, Kentucky) has an estimated 6,870 residents in 2,489 households. The median household income is $144,635, the median home value is $497,800 and the median gross rent is $1,181/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Some estimates have a large margin of error. One figure for this ZIP (gross rent) is marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

6,870

Margin of error ±849

Median household income

$144,635

Margin of error ±$15,506

Median home value

$497,800

Margin of error ±$47,901

Median gross rent

$1,181/mo*

Margin of error ±$659· estimate has a large margin of error

Median age

44.6 yrs

Margin of error ±4.3 yrs

Mean travel time to work

28.2 min

Margin of error ±6.4 min

How ZIP 40023 compares with Kentucky and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 4002344.6 yrsKentucky39.1 yrsUnited States38.9 yrs

Median household income

ZIP 40023$144,635Kentucky$63,726United States$80,734

Per capita income

ZIP 40023$66,318Kentucky$35,821United States$44,673

Poverty rate

ZIP 400233.0%Kentucky16.1%United States12.5%

Unemployment rate

ZIP 400232.2%Kentucky4.9%United States5.2%

Bachelor's degree or higher

ZIP 4002349.5%Kentucky27.6%United States35.7%

Median home value

ZIP 40023$497,800Kentucky$205,600United States$332,700

Median gross rent

ZIP 40023$1,181/mo*Kentucky$967/moUnited States$1,413/mo

Owner-occupied homes

ZIP 4002396.0%Kentucky68.3%United States65.2%

Mean travel time to work

ZIP 4002328.2 minKentucky24.0 minUnited States26.4 min

Worked from home

ZIP 4002320.6%Kentucky10.2%United States15.1%

All figures for ZIP 40023

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 40023 — ACS 2020–2024 5-year estimates
MeasureZIP 40023Margin of errorKentuckyUnited States
Total population6,870±8494,534,824334,922,499
Median age44.6 yrs±4.3 yrs39.1 yrs38.9 yrs
Households2,489±2881,814,469129,227,496
Median household income$144,635±$15,506$63,726$80,734
Per capita income$66,318±$12,584$35,821$44,673
Poverty rate3.0%±2.4 pts16.1%12.5%
Unemployment rate2.2%±2.7 pts4.9%5.2%
Bachelor's degree or higher49.5%±4.8 pts27.6%35.7%
Median home value$497,800±$47,901$205,600$332,700
Median gross rent$1,181/mo*±$659$967/mo$1,413/mo
Owner-occupied homes96.0%±2.2 pts68.3%65.2%
Mean travel time to work28.2 min±6.4 min24.0 min26.4 min
Worked from home20.6%±5.3 pts10.2%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 40023
GroupZIP 40023KentuckyUnited States
White alone, not Hispanic or Latino87.9%81.5%57.4%
Black or African American alone, not Hispanic or Latino3.2%7.6%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.1%0.1%0.5%
Asian alone, not Hispanic or Latino2.2%1.6%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.0%0.1%0.2%
Some other race alone, not Hispanic or Latino0.2%0.3%0.6%
Two or more races, not Hispanic or Latino1.9%3.9%4.3%
Hispanic or Latino (of any race)4.5%5.0%19.3%

Where ZIP 40023 is

State
Kentucky
Main county
Jefferson County— also overlaps Spencer County, Shelby County
Largest overlapping place
Louisville/Jefferson County (60% of the ZIP's land area)
Land area
24.26 sq mi· about 283 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Jefferson County

40025 Glenview, KY40041 Louisville, KY40118 Louisville/Jefferson County, KY40202 Louisville, KY40203 Louisville, KY40204 Louisville, KY40205 Louisville, KY40206 Louisville, KY40207 St. Matthews, KY40208 Louisville, KY40209 Louisville, KY40210 Louisville, KY40211 Louisville, KY40212 Louisville, KY40213 Louisville, KY40214 Louisville/Jefferson County, KY40215 Louisville, KY40216 Louisville/Jefferson County, KY40217 Louisville, KY40218 Louisville/Jefferson County, KY40219 Louisville/Jefferson County, KY40220 Louisville/Jefferson County, KY40222 Louisville/Jefferson County, KY40223 Louisville/Jefferson County, KY

See every ZIP code in Kentucky, or compare ZIP 40023 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.