| ZIP Codes: | 12 ZIP Codes (7 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Codes: | 272 / 570 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:33 PM |
| Population: | 39,903 [See All] |
| FIPS: | 42119 |
| CBSA: | Lewisburg, PA |
| Land Area: | 303 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 40.9417, -77.0480 |
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39,903 residents live across 12 ZIPs covering 303 sq mi, served by 12 distinct USPS-recognized cities.
Population moved from 41,328 to 39,903 from 2014 to 2024 — a -3.4% change. 5 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 17856 (New Columbia, $91,661 median) and poorest ZIP 17886 (West Milton, $47,574) are 5.6 miles apart — a 1.9× income gap across local geography.
Median home values vary 2.1× across this county — from $137,500 in 17829 (Hartleton) to $288,900 in 17889 (Winfield).
Density varies 23× across the county — from 25 people/sq mi in 17845 (Millmont) to 575 in 17886 (West Milton).
Educational attainment ranges from 5.5% bachelor's+ in 17887 (White Deer ) to 39.4% in 17837 (Lewisburg) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #53 most populous of 67 counties and ranks #23 for median household income .
Weighted by population, the typical household earns about $81,600 across the county — reflecting what a typical resident sees, not a simple ZIP average.
30.0% of adults age 25+ hold a bachelor's degree or higher (7,889 of 26,323 reporting).
7 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 17837 | Lewisburg | Standard | 18,403 | $88,975 | 56.4 | -9.6% |
| 17844 | Mifflinburg | Standard | 10,291 | $68,314 | 98.2 | 3.0% |
| 17856 | New Columbia | Standard | 3,167 | $91,661 | 38.4 | -7.4% |
| 17889 | Winfield | Standard | 3,039 | $89,063 | 24.8 | 13.6% |
| 17845 | Millmont | Standard | 2,058 | $66,510 | 81.6 | -3.6% |
| 17855 | New Berlin | Standard | 1,014 | $88,929 | 2.0 | -0.1% |
| 17886 | West Milton | Standard | 804 | $47,574 | 1.4 | 9.1% |
| 17887 | White Deer | PO Box | 591 | — | 0.0 | 97.0% |
| 17829 | Hartleton | PO Box | 212 | $80,417 | 0.0 | -5.8% |
| 17885 | Weikert | PO Box | 181 | $92,917 | 0.0 | 1.7% |
| 17835 | Laurelton | PO Box | 114 | $48,611 | 0.0 | -49.6% |
| 17880 | Swengel | PO Box | 29 | $61,667 | 0.0 | -54.7% |