County ZIP codes · Pennsylvania · FIPS 42043
Dauphin County, PA ZIP Codes
Dauphin County, Pennsylvania has 47 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 31 residential and 16 for PO boxes or a single organization. 26 of the residential ones lie mainly in Dauphin County and 5 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $39,825 in 17103 (Harrisburg) to $115,533 in 17036 (Hummelstown) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Dauphin County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $63,041 and $81,250.
They carry 22 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 31 residential ZIP codes in Dauphin County
26 ZIP codes lie mainly in Dauphin County; 5 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 17112 | Harrisburg | 38,502 | 553 | $104k | $313k | 100% |
| 17111 | Harrisburg | 36,744 | 2,001 | $86k | $236k | 100% |
| 17109 | Harrisburg | 27,466 | 3,941 | $72k | $216k | 100% |
| 17110 | Harrisburg | 27,364 | 1,830 | $81k | $223k | 100% |
| 17057 | Middletown | 23,560 | 757 | $73k | $202k | 100% |
| 17036 | Hummelstown | 23,520 | 838 | $116k | $350k | 100% |
| 17104 | Harrisburg | 18,541 | 5,525 | $47k | $105k | 100% |
| 17033 | Hershey | 16,481 | 602 | $73k | $384k | 88% |
| 17103 | Harrisburg | 13,115 | 6,947 | $40k | $138k | 100% |
| 17113 | Harrisburg | 11,724 | 2,812 | $68k | $162k | 100% |
| 17102 | Harrisburg | 8,118 | 10,724 | $55k | $194k | 100% |
| 17032 | Halifax | 7,551 | 68 | $81k | $226k | 100% |
| 17061 | Millersburg | 6,842 | 210 | $56k | $166k | 100% |
| 17018 | Dauphin | 3,902 | 98 | $72k | $239k | 100% |
| 17048 | Lykens | 3,870 | 115 | $74k | $144k | 100% |
| 17023 | Elizabethville | 3,489 | 170 | $79k | $211k | 100% |
| 17980 | Tower City | 3,342 | 96 | $71k | $150k | 68% |
| 17034 | Highspire | 3,071 | 3,787 | $53k | $146k | 100% |
| 17101 | Harrisburg | 2,722 | 5,225 | $51k | – | 100% |
| 17098 | Williamstown | 2,618 | 281 | $63k | $122k | 100% |
| 17097 | Wiconisco | 721 | 655 | $69k | $100k | 100% |
| 17978 | Spring Glen | 688 | 102 | $66k | $275k | 60% |
| 17030 | Gratz | 541 | 172 | – | $225k | 100% |
| 17005 | Berrysburg | 289 | 513 | $61k | $151k | 100% |
| 17080 | Pillow | 264 | 535 | $73k | $137k | 100% |
| 17120 | Harrisburg | no residents | 0 | – | – | 100% |
Partly in Dauphin County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 17028 | Grantville | 3,563 | 130 | $60k | $163k | 46% |
| 17022 | Elizabethtown | 31,908 | 581 | $87k | $294k | 29% |
| 17017 | Dalmatia | 1,509 | 60 | $82k | $217k | 22% |
| 17078 | Palmyra | 23,840 | 792 | $93k | $306k | 16% |
| 17020 | Duncannon | 8,826 | 153 | $73k | $231k | 3% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
8 ZIP codes of Dauphin County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Dauphin | Elsewhere |
|---|---|---|
| 17022 | 29% | Lancaster County 71% |
| 17078 | 16% | Lebanon County 84% |
| 17033 | 88% | Lebanon County 12% |
| 17020 | 3% | Perry County 97% |
| 17028 | 46% | Lebanon County 54% |
| 17980 | 68% | Schuylkill County 32% |
| 17017 | 22% | Northumberland County 78% |
| 17978 | 60% | Schuylkill County 40% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 17105 | Harrisburg |
| 17106 | Harrisburg |
| 17107 | Harrisburg |
| 17108 | Harrisburg |
| 17121 | Harrisburg |
| 17122 | Harrisburg |
| 17123 | Harrisburg |
| 17124 | Harrisburg |
| 17125 | Harrisburg |
| 17126 | Harrisburg |
| 17127 | Harrisburg |
| 17128 | Harrisburg |
| 17129 | Harrisburg |
| 17130 | Harrisburg |
| 17140 | Harrisburg |
| 17177 | Harrisburg |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Dauphin County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Dauphin County's ZIP codes use 3 prefixes: 170, 171 and 179.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 170 | Harrisburg, PA (SCF 170) | 19 | 92 |
| 171 | Harrisburg, PA (SCF 170) | 26 | 26 |
| 179 | Harrisburg, PA (SCF 170) | 2 | 47 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.