Thornhill is a city in Jefferson County, Kentucky, home to about 192 people across 0.1 square miles. It has no ZIP code of its own: it’s part of 40222.
Homes sold for a median of $193 per square foot in the three months ending August 2026, a seller’s market.
Mostly Louisville/Jefferson County; part is in Thornhill
Each card is that ZIP code’s whole market, including any part outside Thornhill. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Thornhill’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)9 miles away |
|---|---|
| Nearest city of 250,000+ | Louisville/Jefferson County, KY7 miles away |
| Nearest city of 1 million+ | Chicago, IL269 miles away |
Straight-line distances from the center of Thornhill; 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.
Thornhill had 185 residents in the 2020 census, up 6% since 2000.
It’s the 475th 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 (3 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).
728 doctors and other health care providers list an office in Thornhill.
Nearest hospitals
Providers with an office here
| Primary care doctors | 23 |
|---|---|
| Specialist doctors | 52 |
| Dentists | 51 |
| Nurse practitioners and physician assistants | 89 |
| Mental health providers | 251 |
| Physical and occupational therapists | 225 |
| Optometrists | 26 |
| Chiropractors | 11 |
| Pharmacies | 14 |
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 (2 nearby)
Grocery stores (1 nearby)
Pharmacies
Libraries
Museums
Theaters and performance venues
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 |
|---|---|---|---|---|
| Wilder ElementaryLouisville | Pre-K–5 | 496 | Public | 0.8 mi |
| Lowe ElementaryLouisville | K–5 | 608 | Public | 2.3 mi |
| Kammerer MiddleLouisville | 6–8 | 781 | Public | 1.2 mi |
| The Phoenix School of DiscoveryLouisville | 6–12 | 383 | Alternative Education | 1.3 mi |
| Westport MiddleLouisville | 6–8 | 988 | Public | 1.4 mi |
| Ballard HighLouisville | 9–12 | 2,148 | Public | 1.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Islamic School of LouisvilleLouisville | Pre-K–8 | 131 | Islamic | 1.5 mi |
| Our Savior Lutheran SchoolLouisville | Pre-K–8 | 83 | Lutheran Church–Missouri Synod | 1.8 mi |
| St Albert the Great SchoolLouisville | Pre-K–8 | 640 | Roman Catholic | 0.3 mi |
| The Virginia Chance SchoolLouisville | Pre-K–5 | 133 | Nonsectarian | 3.4 mi |
| St Margaret Mary SchoolLouisville | TK–8 | 661 | Roman Catholic | 1.4 mi |
| Pitt AcademyLouisville | K–12 | 63 | Roman Catholic | 0.7 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, Hurstbourne, Lyndon, Louisville, Graymoor-Devondale, St. Matthews, Northfield, Bellemeade, Norwood, Glenview Hills, Bancroft, Crossgate and Glenview Manor.
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.