| ZIP Codes: | 42 ZIP Codes (23 Standard, 6 PO Box, 13 Unique) [See All] |
| Area Codes: | 223 / 272 / 570 / 717 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:31 PM |
| Population: | 285,266 [See All] |
| FIPS: | 42043 |
| CBSA: | Harrisburg-Carlisle, PA |
| Land Area: | 504 sq mi |
| Water Area: | 25 sq mi |
| Coordinates: | 40.3522, -76.8232 |
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285,266 residents live across 42 ZIPs covering 504 sq mi, served by 17 distinct USPS-recognized cities.
Population moved from 266,271 to 285,266 from 2014 to 2024 — a +7.1% change. 13 ZIPs gained residents, 12 lost (and 1 held flat).
The county's wealthiest ZIP 17036 (Hummelstown, $115,533 median) and poorest ZIP 17103 (Harrisburg, $39,825) are 7.6 miles apart — a 2.9× income gap across local geography.
Median home values vary 3.7× across this county — from $104,800 in 17104 (Harrisburg) to $384,100 in 17033 (Hershey).
Density varies 111× across the county — from 73 people/sq mi in 17032 (Halifax) to 8,142 in 17102 (Harrisburg).
Most of the decade's growth concentrated around Harrisburg — top growth ZIPs averaged +29.0% over the past ten years ( 17101 , 17034 and 17103 ).
Educational attainment ranges from 12.4% bachelor's+ in 17048 (Lykens) to 59.9% in 17036 (Hummelstown) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #14 most populous of 67 counties and ranks #33 for median household income with the #6 fastest decade growth .
Hosts 4 single-entity Unique ZIPs: 17107Usps Official ; 17120State Of Pennsylvania ; 17121State Employment Security ; and 17125State General Services .
Weighted by population, the typical household earns about $78,252 across the county — reflecting what a typical resident sees, not a simple ZIP average.
34.2% of adults age 25+ hold a bachelor's degree or higher (67,791 of 198,112 reporting).
23 Standard delivery, 6 PO Box only, 13 single-entity Unique ZIPs serve this county.
13 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 17112 | Harrisburg | Standard | 38,502 | $103,876 | 56.9 | 14.6% |
| 17111 | Harrisburg | Standard | 36,744 | $86,385 | 19.1 | 14.6% |
| 17109 | Harrisburg | Standard | 27,466 | $71,833 | 6.8 | 16.7% |
| 17110 | Harrisburg | Standard | 27,364 | $80,699 | 16.6 | 11.8% |
| 17057 | Middletown | Standard | 23,560 | $73,407 | 37.9 | 6.3% |
| 17036 | Hummelstown | Standard | 23,520 | $115,533 | 28.3 | 8.6% |
| 17104 | Harrisburg | Standard | 18,541 | $46,510 | 3.6 | -12.3% |
| 17033 | Hershey | Standard | 16,481 | $72,945 | 28.4 | -5.8% |
| 17103 | Harrisburg | Standard | 13,115 | $39,825 | 1.9 | 20.9% |
| 17113 | Harrisburg | Standard | 11,724 | $68,244 | 3.5 | 6.1% |
| 17102 | Harrisburg | Standard | 8,118 | $54,573 | 1.0 | -1.7% |
| 17032 | Halifax | Standard | 7,551 | $81,250 | 103.3 | -10.7% |
| 17061 | Millersburg | Standard | 6,842 | $55,611 | 38.5 | 0.2% |
| 17018 | Dauphin | Standard | 3,902 | $72,188 | 44.5 | -8.9% |
| 17048 | Lykens | Standard | 3,870 | $73,993 | 32.3 | -0.2% |
| 17028 | Grantville | Standard | 3,563 | $59,554 | 32.5 | -1.1% |
| 17023 | Elizabethville | Standard | 3,489 | $79,435 | 21.3 | -5.8% |
| 17034 | Highspire | Standard | 3,071 | $52,700 | 0.9 | 26.0% |
| 17101 | Harrisburg | Standard | 2,722 | $50,878 | 1.1 | 40.2% |
| 17098 | Williamstown | Standard | 2,618 | $63,041 | 14.4 | 11.3% |
| 17097 | Wiconisco | PO Box | 721 | $69,063 | 0.0 | -9.1% |
| 17978 | Spring Glen | Standard | 688 | $65,577 | 6.2 | 377.8% |
| 17030 | Gratz | Standard | 541 | — | 3.9 | -38.9% |
| 17005 | Berrysburg | PO Box | 289 | $61,429 | 0.2 | -28.5% |
| 17080 | Pillow | PO Box | 264 | $73,438 | 0.4 | -1.1% |
| 17120 | Harrisburg | Unique | 0 | — | 0.1 | — |
| 17125 | Harrisburg | Unique | — | — | 0.0 | — |
| 17127 | Harrisburg | Unique | — | — | 0.0 | — |
| 17123 | Harrisburg | Unique | — | — | 0.0 | — |
| 17124 | Harrisburg | Unique | — | — | 0.0 | — |
| 17128 | Harrisburg | Unique | — | — | 0.0 | — |
| 17121 | Harrisburg | Unique | — | — | 0.0 | — |
| 17130 | Harrisburg | Unique | — | — | 0.0 | — |
| 17108 | Harrisburg | PO Box | — | — | 0.0 | — |
| 17126 | Harrisburg | Unique | — | — | 0.0 | — |
| 17105 | Harrisburg | PO Box | — | — | 0.0 | — |
| 17122 | Harrisburg | Unique | — | — | 0.0 | — |
| 17129 | Harrisburg | Standard | — | — | 0.0 | — |
| 17140 | Harrisburg | Unique | — | — | 0.0 | — |
| 17106 | Harrisburg | PO Box | — | — | 0.0 | — |
| 17107 | Harrisburg | Unique | — | — | 0.5 | — |
| 17177 | Harrisburg | Unique | — | — | 0.0 | — |