Fairfield is a city in Nelson County, Kentucky, home to about 194 people across 0.3 square miles. Its ZIP code is 40020, and parts of 40013 are in Fairfield too.
Homes sold for a median of $181 per square foot in the three months ending August 2026, a seller’s market.
Mostly Fairfield
Each card is that ZIP code’s whole market, including any part outside Fairfield. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Louisville Muhammad Ali International Airport (SDF)25 miles away |
|---|---|
| Nearest city of 250,000+ | Louisville/Jefferson County, KY21 miles away |
| Nearest city of 1 million+ | Chicago, IL296 miles away |
Straight-line distances from the center of Fairfield; 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.
Fairfield had 118 residents in the 2020 census, up 64% since 2000.
It’s the 472nd largest of 553 towns in Kentucky by population.
Nelson County grew from 16,587 residents in 1900 to 46,738 in 2020.
Nelson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 90°F in summer, and winter lows average 22°F. About 52.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Taylorsville Lake, KY weather station (7 miles away).
17,214 jobs at 1,023 businesses in Nelson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
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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.