| ZIP Codes: | 14 ZIP Codes (12 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 223 / 717 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:32 PM |
| Population: | 48,545 [See All] |
| FIPS: | 42099 |
| CBSA: | Harrisburg-Carlisle, PA |
| Land Area: | 572 sq mi |
| Water Area: | 7 sq mi |
| Coordinates: | 40.4111, -77.2256 |
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48,545 residents live across 14 ZIPs covering 572 sq mi, served by 14 distinct USPS-recognized cities.
Population moved from 47,701 to 48,545 from 2014 to 2024 — a +1.8% change. 8 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 17062 (Millerstown, $90,893 median) and poorest ZIP 17006 (Blain, $64,722) are 28.4 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.8× across this county — from $169,500 in 17006 (Blain) to $302,900 in 17047 (Loysville).
Density varies 10× across the county — from 16 people/sq mi in 17006 (Blain) to 162 in 17090 (Shermans Dale).
Educational attainment ranges from 11.3% bachelor's+ in 17047 (Loysville) to 26.9% in 17053 (Marysville) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #43 most populous of 67 counties and ranks #18 for median household income .
Weighted by population, the typical household earns about $79,894 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.1% of adults age 25+ hold a bachelor's degree or higher (7,025 of 34,966 reporting).
12 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 17020 | Duncannon | Standard | 8,826 | $73,396 | 64.8 | -3.1% |
| 17074 | Newport | Standard | 7,304 | $81,964 | 64.1 | 0.3% |
| 17090 | Shermans Dale | Standard | 5,206 | $78,281 | 32.1 | -5.5% |
| 17053 | Marysville | Standard | 5,067 | $82,269 | 31.6 | 3.1% |
| 17068 | New Bloomfield | Standard | 4,235 | $82,888 | 33.2 | -5.7% |
| 17062 | Millerstown | Standard | 3,917 | $90,893 | 83.5 | -2.9% |
| 17045 | Liverpool | Standard | 3,811 | $76,800 | 37.9 | 20.0% |
| 17047 | Loysville | Standard | 3,228 | $87,578 | 45.9 | 22.5% |
| 17040 | Landisburg | Standard | 2,631 | $78,824 | 53.3 | 11.2% |
| 17024 | Elliottsburg | Standard | 1,734 | $79,292 | 33.8 | -13.9% |
| 17037 | Ickesburg | Standard | 1,176 | $75,000 | 21.3 | 32.7% |
| 17006 | Blain | Standard | 1,102 | $64,722 | 70.0 | 5.9% |
| 17069 | New Buffalo | PO Box | 192 | $80,000 | 0.0 | 82.9% |
| 17071 | New Germantown | PO Box | 116 | $46,667 | 0.0 | -18.3% |