Middletown is a city in Jefferson County, Kentucky, home to about 9,763 people across 5.1 square miles. Its ZIP code is 40243, and parts of 40223 and 40299 are in Middletown too.
Homes sold for a median of $196 per square foot in the three months ending August 2026, a seller’s market.
Mostly Middletown; also Douglass Hills and Woodland Hills
Mostly Louisville/Jefferson County; part is in Middletown
Mostly Louisville/Jefferson County; part is in Middletown
Each card is that ZIP code’s whole market, including any part outside Middletown. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Middletown’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)12 miles away |
|---|---|
| Nearest city of 250,000+ | Louisville/Jefferson County, KY8 miles away |
| Nearest city of 1 million+ | Chicago, IL273 miles away |
Straight-line distances from the center of Middletown; 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.
Middletown had 9,706 residents in the 2020 census, up 69% since 2000.
It’s the 49th 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 88°F in summer, and winter lows average 27°F. About 48.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Louisville Bowman Fld, KY weather station (7 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).
266 doctors and other health care providers list an office in Middletown.
Nearest hospitals
Providers with an office here
| Primary care doctors | 28 |
|---|---|
| Specialist doctors | 14 |
| Dentists | 38 |
| Nurse practitioners and physician assistants | 30 |
| Mental health providers | 89 |
| Physical and occupational therapists | 54 |
| Optometrists | 2 |
| Chiropractors | 11 |
| Pharmacies | 9 |
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 (7 nearby)
Grocery stores (2 nearby)
Pharmacies (2 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Counts are within about 1.5 miles 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.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Jefferson County. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Middletown ElementaryLouisville | Pre-K–5 | 573 | Public | 0.8 mi |
| Hite ElementaryMiddletown | K–5 | 498 | Public | 0.8 mi |
| Crosby MiddleMiddletown | 6–8 | 809 | Public | 0.9 mi |
| Eastern HighMiddletown | 9–12 | 1,790 | Public | 0.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Highlands Latin SchoolLouisville | Pre-K–12 | 694 | Christian (no specific denomination) | 0.9 mi |
| Middletown Christian Preschool & KindergartenLouisville | Pre-K–K | 10 | Disciples of Christ | 0.2 mi |
| Summit Academy of Greater LouisvilleLouisville | Pre-K–12 | 112 | Nonsectarian | 0.5 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, Jeffersontown, Douglass Hills, Lyndon, Anchorage, Blue Ridge Manor, Woodland Hills, Moorland, Bellemeade, Forest Hills, Wildwood, Sycamore and Meadowbrook Farm.
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.