| ZIP Codes: | 23 ZIP Codes (18 Standard, 4 PO Box, 1 Unique) [See All] |
| Area Codes: | 272 / 570 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:32 PM |
| Population: | 119,501 [See All] |
| FIPS: | 42081 |
| CBSA: | Williamsport, PA |
| Land Area: | 1,154 sq mi |
| Water Area: | 14 sq mi |
| Coordinates: | 41.3029, -77.0522 |
| Quick Link: |
119,501 residents live across 23 ZIPs covering 1,154 sq mi, served by 20 distinct USPS-recognized cities.
Population moved from 123,931 to 119,220 from 2014 to 2024 — a -3.8% change. 4 ZIPs gained residents, 14 lost (and 1 held flat).
The county's wealthiest ZIP 17810 (Allenwood, $77,232 median) and poorest ZIP 17701 (Williamsport, $53,237) are 11.4 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.4× across this county — from $179,600 in 17740 (Jersey Shore) to $249,300 in 17754 (Montoursville).
Density varies 29× across the county — from 15 people/sq mi in 17771 (Trout Run) to 433 in 17701 (Williamsport).
Educational attainment ranges from 4.8% bachelor's+ in 17810 (Allenwood) to 30.0% in 17754 (Montoursville) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #29 most populous of 67 counties and ranks #27 for median household income .
Hosts 1 single-entity Unique ZIP: 17705Williamsport .
Weighted by population, the typical household earns about $65,861 across the county — reflecting what a typical resident sees, not a simple ZIP average.
23.8% of adults age 25+ hold a bachelor's degree or higher (20,244 of 84,899 reporting).
18 Standard delivery, 4 PO Box only, 1 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 17701 | Williamsport | Standard | 43,104 | $53,237 | 99.6 | -3.6% |
| 17756 | Muncy | Standard | 12,856 | $77,043 | 110.1 | 2.0% |
| 17754 | Montoursville | Standard | 12,061 | $72,633 | 61.9 | -0.5% |
| 17740 | Jersey Shore | Standard | 12,017 | $70,236 | 155.7 | -6.4% |
| 17702 | Williamsport | Standard | 10,488 | $70,210 | 62.7 | -1.4% |
| 17737 | Hughesville | Standard | 5,970 | $70,131 | 73.4 | 0.0% |
| 17810 | Allenwood | Standard | 5,309 | $77,232 | 56.8 | -10.8% |
| 17752 | Montgomery | Standard | 4,975 | $71,118 | 42.8 | 3.4% |
| 17728 | Cogan Station | Standard | 4,675 | $77,165 | 62.4 | -8.3% |
| 17771 | Trout Run | Standard | 2,929 | $71,016 | 197.9 | -14.6% |
| 17744 | Linden | Standard | 2,808 | $72,500 | 22.6 | -7.8% |
| 17774 | Unityville | Standard | 962 | $70,556 | 28.2 | -25.4% |
| 17762 | Picture Rocks | PO Box | 557 | $95,625 | 0.0 | 5.1% |
| 17720 | Antes Fort | PO Box | 250 | $70,300 | 0.0 | — |
| 17763 | Ralston | PO Box | 241 | $57,083 | 0.4 | -40.2% |
| 17776 | Waterville | Standard | 145 | $67,500 | 55.6 | -48.0% |
| 17727 | Cedar Run | Standard | 41 | $49,464 | 17.9 | -36.9% |
| 17723 | Cammal | Standard | 34 | $77,500 | 39.8 | -20.9% |
| 17769 | Slate Run | Standard | 31 | $130,000 | 45.8 | — |
| 17739 | Jersey Mills | Standard | 27 | $55,417 | 20.0 | 3.8% |
| 17742 | Lairdsville | Standard | 21 | $71,250 | 0.8 | -70.8% |
| 17703 | Williamsport | PO Box | — | — | 0.0 | — |
| 17705 | Williamsport | Unique | — | — | 0.0 | — |