Residential delivery area · Kentucky
ZIP Code 40243: Louisville, KY
ZIP code 40243 uses the postal name Louisville, Kentucky and lies entirely in Jefferson County (Census 2020 ZIP-county file). About 12,000 people live there (Census Bureau, ACS 2020-2024), the 27th most populous of Louisville's 34 residential ZIP codes. Median household income is $77,587 (Census Bureau, ACS 2020-2024). Most of its land (68%) lies in the city of Middletown.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Louisville · 34 residential ZIPs
- County
- Jefferson County
- Census places
- Middletown (68%); Douglass Hills (24%); Woodland Hills (5%)
- Metro area
- Louisville/Jefferson County, KY-IN
- House district
- KY-3 119th Congress
- State
- Kentucky
- Time zone
- Eastern
- Land area
- 4.1 sq mi · 2,922 people per sq mi
- PO Box ZIPs
- 32 more ZIP codes use the name Louisville for PO boxes or single organizations
Where is ZIP code 40243?
40243 centers on 38.240°, -85.533° and covers 4.1 square miles of land plus 0.0 of water. It borders 3 ZIP codes: 40223, 40245, 40299.
The map draws ZIP code areas only. For the streets inside 40243, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 40243 compare with the rest of Louisville?
| Measure | 40243 | In Louisville | In KY |
|---|---|---|---|
| People (ACS 2020-2024) | 12,002 | 27th of 34 | 119th of 780 |
| Median household income | $78k | 12th of 29 | 67th of 310 |
| Median home value | $323k | 8th of 29 | 27th of 320 |
Its median household income is higher than in 59% of U.S. residential ZIP codes, and it is denser than 88% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 40243?
The 2020 Census counted 11,521 people in 40243; the ACS, which samples households over 2020-2024, estimates 12,002. Between the 2010 and 2020 censuses its population grew 12.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 12,002
- 2020 Census count
- 11,521+12.8% since 2010 (10,210)
- Households
- 5,741
- Median age
- 48.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 40243?
Of the 12,002 people the ACS estimates in 40243, 19.3% are under 18 and 26.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (78.8%).
- Under 1819.3%
- 18 to 6454.2%
- 65 and older26.5%
- White, not Hispanic78.8%
- Hispanic or Latino6.8%
- Black, not Hispanic6.2%
- Other or two or more4.5%
- Asian, not Hispanic3.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 40243 earn?
Median household income is $77,587 (ACS 2020-2024), the 12th highest of the 29 ranked ZIP codes in Louisville. It fell from $92,682 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $77,587
- Income per person
- $49,797
- Below the poverty line
- 7.2%
- Unemployed (of the labor force)
- 5.6%
- Adults 25+ with a bachelor's degree
- 54.9%
- Adjusted gross income per tax return, 2022
- $77,7236,180 returns; wages 69% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 40243?
FHFA's house price index for 40243, built from repeat sales and appraisals of the same homes, rose 76% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved +4.0% in 2025.
- Median home value (owners' estimate)
- $323,200
- Median gross rent
- $1,444
- Homes owned by their occupants
- 63.1%
- Housing units
- 6,204
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 40243?
659 business establishments had a location in this ZIP code in 2023, 25 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services100
- Health care and social assistance90
- Finance and insurance89
- Retail trade85
- Other services (except public administration)77
- Accommodation and food services62
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 40243?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 40223 | Louisville | 22,798 | $97k | 1.3 mi |
| 40245 | Louisville | 39,835 | $123k | 5.1 mi |
| 40299 | Louisville | 42,207 | $89k | 6.2 mi |
| 40242 | Louisville | 11,168 | $75k | 3.9 mi (near) |
| 40222 | Louisville | 21,470 | $83k | 4.6 mi (near) |
| 40241 | Louisville | 30,696 | $94k | 4.7 mi (near) |
| 40220 | Louisville | 35,078 | $78k | 5.0 mi (near) |
| 40056 | Pewee Valley | 3,441 | $134k | 5.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.