Spring Mill is a city in Jefferson County, Kentucky, home to about 389 people across 0.1 square miles. It has no ZIP code of its own: it’s part of 40228.
Homes sold for a median of $157 per square foot in the three months ending August 2026, a seller’s market.
Mostly Louisville/Jefferson County; part is in Spring Mill
Each card is that ZIP code’s whole market, including any part outside Spring Mill. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Spring Mill’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Louisville Muhammad Ali International Airport (SDF)6 miles away |
|---|---|
| Nearest city of 250,000+ | Louisville/Jefferson County, KY2 miles away |
| Nearest city of 1 million+ | Chicago, IL277 miles away |
Straight-line distances from the center of Spring Mill; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Spring Mill had 294 residents in the 2020 census, down 23% since 2000.
It’s the 386th largest of 553 towns in Kentucky by population.
Jefferson County grew from 232,549 residents in 1900 to 782,969 in 2020.
Jefferson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 26°F. About 53.1 inches of rain and melted snow fall in a typical year, with about 15 inches of snow.
Source: NOAA 1991–2020 climate normals, Louisville Wfo, KY weather station (2 miles away).
470,153 jobs at 20,164 businesses in Jefferson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
30 doctors and other health care providers list an office in Spring Mill.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Dentists | 4 |
| Nurse practitioners and physician assistants | 9 |
| Mental health providers | 9 |
| Physical and occupational therapists | 7 |
| Pharmacies | 4 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (1 nearby)
Grocery stores (2 nearby)
Pharmacies (1 nearby)
Libraries
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Jefferson County. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Smyrna Elementary SchoolLouisville | Pre-K–5 | 515 | Public | 0.9 mi |
| Luhr ElementaryLouisville | K–5 | 544 | Public | 0.4 mi |
| Marion C. Moore SchoolLouisville | 6–12 | 1,892 | Public | 0.7 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St Bernard Catholic SchoolLouisville | Pre-K–8 | 339 | Roman Catholic | 0.4 mi |
| Whitefield AcademyLouisville | Pre-K–12 | 556 | Baptist | 0.6 mi |
| Mercy AcademyLouisville | 9–12 | 508 | Roman Catholic | 1.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Louisville/Jefferson County and Hollow Creek.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.