Residential delivery area · Kentucky
ZIP Code 40203: Louisville, KY
ZIP code 40203 is in Louisville, Kentucky, entirely in Jefferson County (Census 2020 ZIP-county file). About 18,000 people live there (Census Bureau, ACS 2020-2024), the 21st most populous of Louisville's 34 residential ZIP codes. Median household income is $30,794 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Louisville · 34 residential ZIPs
- County
- Jefferson County
- Census places
- Louisville
- Metro area
- Louisville/Jefferson County, KY-IN
- House district
- KY-3 119th Congress
- State
- Kentucky
- Time zone
- Eastern
- Land area
- 2.9 sq mi · 6,128 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 40203?
40203 centers on 38.252°, -85.765° and covers 2.9 square miles of land. It borders 7 ZIP codes: 40202, 40210, 40212, 40208, 40204, 40217, 40211.
The map draws ZIP code areas only. For the streets inside 40203, 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 40203 compare with the rest of Louisville?
| Measure | 40203 | In Louisville | In KY |
|---|---|---|---|
| People (ACS 2020-2024) | 17,742 | 21st of 34 | 89th of 780 |
| Median household income | $31k | 29th of 29 | 306th of 310 |
| Median home value | $197k | 19th of 29 | 112th of 320 |
Its median household income is higher than in 2% of U.S. residential ZIP codes, and it is denser than 95% 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 40203?
The 2020 Census counted 16,801 people in 40203; the ACS, which samples households over 2020-2024, estimates 17,742. Between the 2010 and 2020 censuses its population fell 14.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 17,742
- 2020 Census count
- 16,801−14.7% since 2010 (19,694)
- Households
- 8,911
- Median age
- 32.8
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 40203?
Of the 17,742 people the ACS estimates in 40203, 22.3% are under 18 and 13.3% are 65 or older. The largest group by race and Hispanic origin is Black (not Hispanic) (51.4%), then White (not Hispanic) (39.7%).
- Under 1822.3%
- 18 to 6464.5%
- 65 and older13.3%
- Black, not Hispanic51.4%
- White, not Hispanic39.7%
- Other or two or more5.1%
- Hispanic or Latino3.2%
- Asian, not Hispanic0.6%
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 40203 earn?
Median household income is $30,794 (ACS 2020-2024), the 29th highest of the 29 ranked ZIP codes in Louisville. It rose from $24,104 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $30,794±$4,966
- Income per person
- $23,941
- Below the poverty line
- 43.3%
- Unemployed (of the labor force)
- 11.8%
- Adults 25+ with a bachelor's degree
- 22.5%
- Adjusted gross income per tax return, 2022
- $36,5255,880 returns; wages 83% 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 40203?
FHFA's house price index for 40203, built from repeat sales and appraisals of the same homes, rose 109% from 2015 to 2025 and rose 39% from 2020 to 2025, and moved +4.4% in 2025.
- Median home value (owners' estimate)
- $197,300
- Median gross rent
- $809
- Homes owned by their occupants
- 24.9%
- Housing units
- 10,481
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 40203?
522 business establishments had a location in this ZIP code in 2023, 6 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance84
- Other services (except public administration)82
- Retail trade59
- Professional, scientific, and technical services53
- Construction36
- Wholesale trade35
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 40203?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 40202 | Louisville | 7,261 | $36k | 0.7 mi |
| 40210 | Louisville | 13,518 | $35k | 1.8 mi |
| 40212 | Louisville | 14,661 | $36k | 2.3 mi |
| 40208 | Louisville | 15,605 | $40k | 2.4 mi |
| 40204 | Louisville | 14,034 | $71k | 2.5 mi |
| 40217 | Louisville | 11,663 | $69k | 2.9 mi |
| 40211 | Louisville | 20,407 | $32k | 3.4 mi |
| 40206 | Louisville | 20,161 | $76k | 3.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.