| ZIP Codes: | 15 ZIP Codes (10 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Codes: | 272 / 570 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:33 PM |
| Population: | 39,932 [See All] |
| FIPS: | 42109 |
| CBSA: | Selinsgrove, PA |
| Land Area: | 337 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 40.7783, -77.0508 |
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39,932 residents live across 15 ZIPs covering 337 sq mi, served by 14 distinct USPS-recognized cities.
Population moved from 40,881 to 39,932 from 2014 to 2024 — a -2.3% change. 5 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 17864 (Port Trevorton, $79,881 median) and poorest ZIP 17862 (Penns Creek , $52,868) are 13.5 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.5× across this county — from $160,100 in 17812 (Beaver Springs) to $236,800 in 17870 (Selinsgrove).
Density varies 31× across the county — from 51 people/sq mi in 17812 (Beaver Springs) to 1,597 in 17827 (Freeburg).
Educational attainment ranges from 6.6% bachelor's+ in 17841 (Mc Clure) to 29.5% in 17870 (Selinsgrove) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #52 most populous of 67 counties and ranks #52 for median household income .
Weighted by population, the typical household earns about $66,980 across the county — reflecting what a typical resident sees, not a simple ZIP average.
19.6% of adults age 25+ hold a bachelor's degree or higher (5,304 of 27,113 reporting).
10 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 |
|---|---|---|---|---|---|---|
| 17870 | Selinsgrove | Standard | 14,490 | $70,339 | 48.4 | -4.0% |
| 17842 | Middleburg | Standard | 8,266 | $62,940 | 82.5 | -6.2% |
| 17841 | Mc Clure | Standard | 4,896 | $63,269 | 73.4 | -0.2% |
| 17853 | Mount Pleasant Mills | Standard | 2,993 | $63,787 | 43.6 | -12.3% |
| 17864 | Port Trevorton | Standard | 2,495 | $79,881 | 23.5 | 4.8% |
| 17813 | Beavertown | Standard | 2,028 | $64,792 | 36.8 | -0.6% |
| 17876 | Shamokin Dam | Standard | 1,827 | $70,972 | 1.9 | 14.8% |
| 17812 | Beaver Springs | Standard | 1,378 | $59,338 | 26.8 | -5.9% |
| 17827 | Freeburg | Standard | 877 | $61,806 | 0.5 | 24.6% |
| 17862 | Penns Creek | PO Box | 530 | $52,868 | 0.0 | 25.9% |
| 17861 | Paxtonville | PO Box | 152 | $66,607 | 0.0 | 141.3% |
| 17833 | Kreamer | PO Box | — | — | 0.0 | — |
| 17882 | Troxelville | PO Box | — | — | 0.0 | — |
| 17843 | Beaver Springs | Standard | — | — | 0.0 | — |
| 17831 | Hummels Wharf | PO Box | — | — | 0.0 | — |