Fairfield Kentucky ZIP Codes
Fairfield holds a single ZIP code.
Every ZIP code in Fairfield
| ZIP code | County |
|---|---|
| 40020 | Nelson County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Fairfield codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Fairfield. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Fairfield ZIP code begins 400. Those first three digits identify the sectional center facility that processes mail for this part of Kentucky. Statewide that range covers 54 ZIP codes, so Fairfield accounts for 2% of it.
Every Kentucky ZIP prefix and the region it covers →
Area codes covering Fairfield
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Fairfield occupies.
Fairfield Kentucky area codes in full →
Where Fairfield's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Fairfield
| City | Distance | ZIP codes |
|---|---|---|
| Bloomfield Kentucky ZIP codes | 4.0 mi | 1 ZIP code |
| Taylorsville Kentucky ZIP codes | 7.3 mi | 1 ZIP code |
| Bardstown Kentucky ZIP codes | 8.7 mi | 1 ZIP code |
| Mount Washington Kentucky ZIP codes | 12 mi | 1 ZIP code |
| Willisburg Kentucky ZIP codes | 17 mi | 1 ZIP code |
| Shepherdsville Kentucky ZIP codes | 18 mi | 2 ZIP codes |
| Springfield Kentucky ZIP codes | 19 mi | 1 ZIP code |
| Hillview Kentucky ZIP codes | 19 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.