40020
ZIP 40020 is Fairfield, Kentucky, in Nelson County; area code 502; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Nelson
- Metro area
- Louisville/Jefferson County, KY-IN
- Population
- 199
- Coordinates
- 37.9348, -85.3874
Weather right now
Asking the National Weather Service…
Where 40020 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 40020 into a pocket calculator and turn it upside down: OZOOh — not quite a word, sorry.
- ➕ As a number, 40,020 = 2 × 2 × 3 × 5 × 23 × 29. Its digits add up to 6, a total 90 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1001110001010100 - 🏠 Its numerical neighbours: 40019 (Eminence, KY, 32 mi away) and 40022 (Finchville, KY, 15 mi away).
- 🔄 Backwards, 40020 becomes 02004, which is not a ZIP code at all.
- 👥 5 other ZIP codes are made of exactly the same digits (02040, 04002, 04020, 20004, 20040). The farthest-flung twin is 04020 in Cornish, ME, 860 miles away.
- 🧭 Farther south than 59% of all ZIP codes, and farther east than 56%.
- 🎯721 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 40020 and you would come out at 37.93°S, 94.61°E — 1,269 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 48m of daylight. Shortest: 9h 32m.
- 📏 At 0.475 square miles of land, 40020 is bigger than 5% of ZIP codes — about 230 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 199This ZIP199 |
|---|---|
| Households | 119This ZIP119 |
| Housing units | 119This ZIP119 |
| Median age | 59.9This ZIP59.9Kentucky39.1US 38.9 |
| Median household income | $90,712This ZIP$90,712Kentucky$63,726US $80,734 |
| Bachelor's degree or higher | 13.0%This ZIP13.0% |
| Mean commute | 34.7 minThis ZIP34.7 min |
| Population density | 418.9 / sq miThis ZIP418.9 / sq mi |
Land area
| Land area | 0.48 sq miThis ZIP0.48 sq mi |
|---|---|
| Water area | 0.00 sq miThis ZIP0.00 sq mi |
Other place names in 40020
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 40020
| ZIP | City | Distance |
|---|---|---|
40013 | Coxs Creek, KY | 5.2 mi |
40008 | Bloomfield, KY | 6.4 mi |
40071 | Taylorsville, KY | 7.5 mi |
40048 | Nazareth, KY | 7.5 mi |
40004 | Bardstown, KY | 10.2 mi |
40047 | Mount Washington, KY | 11.5 mi |
40012 | Chaplin, KY | 12.1 mi |
40046 | Mount Eden, KY | 13.4 mi |
40110 | Clermont, KY | 14.4 mi |
40078 | Willisburg, KY | 15.0 mi |
Find every ZIP code within 10 miles of 40020 →
Questions about this ZIP code
Where is ZIP code 40020?
40020 is in Fairfield, Kentucky, in Nelson County, part of the Louisville/Jefferson County, KY-IN metropolitan area. Its published point location is 37.9348, -85.3874.
What county is 40020 in?
40020 lies in Nelson County.
What area code is 40020?
Fairfield uses area code 502, from NANPA's telephone records.
What time zone is 40020 in?
40020 uses America/New_York.
How many people live in 40020?
About 199 people live in ZIP code 40020, in 119 households, at 418.9 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 40020?
$90,712 a year, against $63,726 across Kentucky.
What ZIP codes are near 40020?
The closest are 40013 (5.2 mi), 40008 (6.4 mi), 40071 (7.5 mi), 40048 (7.5 mi) and 40004 (10.2 mi).
Is 40020 a PO Box ZIP code?
40020 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “40020 ZIP Code — Fairfield, Kentucky (Nelson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/40020
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/40020.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.