Residential delivery area · Kentucky
ZIP Code 40047: Mount Washington, KY
ZIP code 40047 uses the postal name Mount Washington, Kentucky and lies mostly in Bullitt County (95% of its land) with the rest in Spencer County (Census 2020 ZIP-county file). About 24,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $99,124 (Census Bureau, ACS 2020-2024). By Census place, 31% of its land lies in Mount Washington; 68% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Mount Washington · its only residential ZIP
- County
- Bullitt County (95%); Spencer County (4%)
- Census places
- Mount Washington
- Metro area
- Louisville/Jefferson County, KY-IN
- House districts
- KY-2 (96%), KY-4 (4%) 119th Congress, by share of land
- State
- Kentucky
- Time zone
- Eastern
- Land area
- 29.9 sq mi · 792 people per sq mi
Where is ZIP code 40047?
40047 centers on 38.036°, -85.556° and covers 29.9 square miles of land plus 0.3 of water. It borders 6 ZIP codes: 40291, 40229, 40013, 40165, 40299, 40071.
The map draws ZIP code areas only. For the streets inside 40047, 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 40047 compare with the rest of Bullitt County?
| Measure | 40047 | In Bullitt County | In KY |
|---|---|---|---|
| People (ACS 2020-2024) | 23,662 | 4th of 10 | 61st of 780 |
| Median household income | $99k | 2nd of 8 | 21st of 310 |
| Median home value | $279k | 2nd of 8 | 44th of 320 |
Its median household income is higher than in 80% of U.S. residential ZIP codes, and it is denser than 76% 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 40047?
The 2020 Census counted 23,597 people in 40047; the ACS, which samples households over 2020-2024, estimates 23,662. Between the 2010 and 2020 censuses its population grew 22.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 23,662
- 2020 Census count
- 23,597+22.0% since 2010 (19,345)
- Households
- 8,881
- Median age
- 40.3
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 40047?
Of the 23,662 people the ACS estimates in 40047, 23.8% are under 18 and 15.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.0%).
- Under 1823.8%
- 18 to 6460.4%
- 65 and older15.8%
- White, not Hispanic93.0%
- Other or two or more3.7%
- Hispanic or Latino2.7%
- Asian, not Hispanic0.5%
- Black, not Hispanic0.1%
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 40047 earn?
Median household income is $99,124 (ACS 2020-2024), the 2nd highest of the 8 ranked ZIP codes in Bullitt County. It rose from $87,413 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $99,124
- Income per person
- $43,356
- Below the poverty line
- 4.7%
- Unemployed (of the labor force)
- 3.8%
- Adults 25+ with a bachelor's degree
- 26.2%
- Adjusted gross income per tax return, 2022
- $77,25811,720 returns; wages 79% 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 40047?
FHFA's house price index for 40047, built from repeat sales and appraisals of the same homes, rose 87% from 2015 to 2025 and rose 47% from 2020 to 2025, and moved +6.8% in 2025.
- Median home value (owners' estimate)
- $279,400
- Median gross rent
- $1,027
- Homes owned by their occupants
- 88.8%
- Housing units
- 9,261
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 40047?
335 business establishments had a location in this ZIP code in 2023, 38 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction60
- Retail trade47
- Health care and social assistance39
- Other services (except public administration)39
- Accommodation and food services30
- Professional, scientific, and technical services28
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 40047?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 40291 | Louisville | 41,222 | $81k | 6.4 mi |
| 40229 | Louisville | 41,299 | $80k | 6.8 mi |
| 40013 | Coxs Creek | 6,670 | $100k | 7.6 mi |
| 40165 | Shepherdsville | 38,403 | $80k | 8.2 mi |
| 40299 | Louisville | 42,207 | $89k | 8.3 mi |
| 40071 | Taylorsville | 17,239 | $99k | 9.6 mi |
| 40228 | Louisville | 18,085 | $79k | 8.4 mi (near) |
| 40110 | Clermont | 440 | $47k | 8.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.