| ZIP Codes: | 12 ZIP Codes (10 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 270 / 364 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:18 PM |
| Population: | 38,094 [See All] |
| FIPS: | 21083 |
| CBSA: | Mayfield, KY |
| Land Area: | 608 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 36.7438, -88.6708 |
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38,094 residents live across 12 ZIPs covering 608 sq mi, served by 12 distinct USPS-recognized cities.
Population moved from 39,425 to 38,094 from 2014 to 2024 — a -3.4% change. 3 ZIPs gained residents, 8 lost.
The county's wealthiest ZIP 42051 (Hickory, $76,000 median) and poorest ZIP 42066 (Mayfield, $48,664) are 10.7 miles apart — a 1.6× income gap across local geography.
Median home values vary 2.1× across this county — from $106,000 in 42085 (Water Valley) to $223,200 in 42082 (Symsonia).
Density varies 5× across the county — from 20 people/sq mi in 42040 (Farmington) to 108 in 42066 (Mayfield).
Educational attainment ranges from 3.5% bachelor's+ in 42085 (Water Valley) to 26.6% in 42082 (Symsonia) — the breadth of educational profiles across the area.
Within Kentucky, this is the #27 most populous of 120 counties and ranks #58 for median household income .
Weighted by population, the typical household earns about $53,407 across the county — reflecting what a typical resident sees, not a simple ZIP average.
18.1% of adults age 25+ hold a bachelor's degree or higher (4,742 of 26,214 reporting).
10 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 42066 | Mayfield | Standard | 23,917 | $48,664 | 220.6 | 2.9% |
| 42088 | Wingo | Standard | 2,497 | $52,745 | 68.4 | -6.4% |
| 42051 | Hickory | Standard | 2,114 | $76,000 | 54.7 | -22.9% |
| 42027 | Boaz | Standard | 1,875 | $58,056 | 47.0 | -20.0% |
| 42082 | Symsonia | Standard | 1,803 | $67,000 | 28.4 | -9.7% |
| 42039 | Fancy Farm | Standard | 1,694 | $70,726 | 46.9 | -6.4% |
| 42079 | Sedalia | Standard | 1,315 | $59,375 | 53.5 | -18.3% |
| 42069 | Melber | Standard | 1,214 | $48,929 | 24.9 | 54.3% |
| 42085 | Water Valley | Standard | 914 | $57,679 | 28.7 | 11.5% |
| 42040 | Farmington | Standard | 692 | $51,141 | 34.8 | -48.5% |
| 42061 | Lowes | PO Box | 59 | — | 0.0 | -11.9% |
| 42063 | Lynnville | PO Box | — | — | 0.0 | — |