| ZIP Codes: | 11 ZIP Codes (10 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 502 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:19 PM |
| Population: | 18,998 [See All] |
| FIPS: | 21103 |
| CBSA: | Louisville/Jefferson County, KY-IN |
| Land Area: | 369 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 38.4674, -85.1407 |
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18,998 residents live across 11 ZIPs covering 369 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 17,555 to 18,998 from 2014 to 2024 — a +8.2% change. 5 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 40055 (Pendleton, $97,939 median) and poorest ZIP 40050 (New Castle, $44,688) are 9.8 miles apart — a 2.2× income gap across local geography.
Median home values vary 2.6× across this county — from $127,300 in 40050 (New Castle) to $325,300 in 40068 (Smithfield).
Density varies 20× across the county — from 6 people/sq mi in 40036 (Lockport) to 121 in 40050 (New Castle).
Educational attainment ranges from 5.6% bachelor's+ in 40036 (Lockport) to 30.9% in 40068 (Smithfield) — the breadth of educational profiles across the area.
Within Kentucky, this is the #61 most populous of 120 counties and ranks #25 for median household income with the #18 fastest decade growth .
Weighted by population, the typical household earns about $70,984 across the county — reflecting what a typical resident sees, not a simple ZIP average.
18.6% of adults age 25+ hold a bachelor's degree or higher (2,408 of 12,972 reporting).
10 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 40019 | Eminence | Standard | 4,238 | $60,761 | 38.4 | 8.9% |
| 40057 | Pleasureville | Standard | 4,065 | $77,866 | 93.9 | 21.9% |
| 40068 | Smithfield | Standard | 2,570 | $80,750 | 45.8 | 31.1% |
| 40011 | Campbellsburg | Standard | 2,379 | $70,881 | 46.8 | 6.9% |
| 40050 | New Castle | Standard | 2,045 | $44,688 | 16.9 | 11.9% |
| 40055 | Pendleton | Standard | 1,942 | $97,939 | 23.4 | -4.8% |
| 40075 | Turners Station | Standard | 1,151 | $64,375 | 53.8 | -11.3% |
| 40070 | Sulphur | Standard | 360 | — | 13.4 | -6.0% |
| 40036 | Lockport | Standard | 164 | — | 26.7 | -30.8% |
| 40007 | Bethlehem | Standard | 47 | $64,417 | 10.0 | -81.3% |
| 40058 | Port Royal | PO Box | 37 | $66,635 | 0.0 | -64.4% |