County ZIP codes · Pennsylvania · FIPS 42097
Northumberland County, PA ZIP Codes
Northumberland County, Pennsylvania has 29 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 28 residential and 1 for PO boxes or a single organization. 22 of the residential ones lie mainly in Northumberland County and 6 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $48,750 in 17872 (Shamokin) to $82,396 in 17017 (Dalmatia) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Northumberland 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 $54,122 and $76,971.
They carry 28 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 28 residential ZIP codes in Northumberland County
22 ZIP codes lie mainly in Northumberland County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 17801 | Sunbury | 16,429 | 248 | $61k | $154k | 100% |
| 17847 | Milton | 11,260 | 243 | $59k | $197k | 80% |
| 17866 | Coal Township | 9,769 | 401 | $51k | $88k | 100% |
| 17872 | Shamokin | 8,894 | 207 | $49k | $82k | 100% |
| 17857 | Northumberland | 7,671 | 288 | $67k | $202k | 100% |
| 17851 | Mount Carmel | 7,234 | 483 | $54k | $79k | 100% |
| 17777 | Watsontown | 7,030 | 191 | $67k | $217k | 97% |
| 17834 | Kulpmont | 3,480 | 617 | $56k | $94k | 100% |
| 17860 | Paxinos | 2,332 | 83 | $92k | $276k | 100% |
| 17830 | Herndon | 1,938 | 63 | $74k | $195k | 100% |
| 17017 | Dalmatia | 1,509 | 60 | $82k | $217k | 78% |
| 17881 | Trevorton | 1,479 | 535 | $54k | $120k | 100% |
| 17823 | Dornsife | 1,258 | 37 | $79k | $232k | 100% |
| 17868 | Riverside | 719 | 2,078 | $76k | $247k | 100% |
| 17832 | Marion Heights | 578 | 738 | $53k | $90k | 100% |
| 17850 | Montandon | 576 | 1,280 | $51k | $85k | 100% |
| 17867 | Rebuck | 239 | 81 | $76k | $178k | 100% |
| 17749 | McEwensville | 234 | 701 | $75k | $197k | 100% |
| 17836 | Leck Kill | 190 | 54 | $91k | $138k | 100% |
| 17840 | Locust Gap | 188 | 94 | – | – | 100% |
| 17865 | Potts Grove | 24 | 54 | $37k | $146k | 100% |
| 17730 | Dewart | 11 | 57 | – | – | 100% |
Partly in Northumberland County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 17824 | Elysburg | 3,949 | 141 | $118k | $245k | 44% |
| 17941 | Klingerstown | 733 | 29 | $64k | $207k | 36% |
| 17772 | Turbotville | 2,693 | 116 | $81k | $242k | 31% |
| 17821 | Danville | 18,613 | 138 | $77k | $250k | 24% |
| 17756 | Muncy | 12,856 | 119 | $77k | $223k | 14% |
| 17964 | Pitman | 952 | 41 | $78k | $240k | 10% |
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?
9 ZIP codes of Northumberland County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Northumberland | Elsewhere |
|---|---|---|
| 17821 | 24% | Montour County 70%; Columbia County 6% |
| 17756 | 14% | Lycoming County 82%; Montour County 3%; Columbia County 2% |
| 17847 | 80% | Montour County 20% |
| 17777 | 97% | Montour County 3% |
| 17824 | 44% | Columbia County 55%; Montour County 2% |
| 17772 | 31% | Montour County 69% |
| 17017 | 78% | Dauphin County 22% |
| 17964 | 10% | Schuylkill County 90% |
| 17941 | 36% | Schuylkill County 64% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 17877 | Snydertown |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Northumberland County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Northumberland County's ZIP codes use 4 prefixes: 170, 177, 178 and 179.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 170 | Harrisburg, PA (SCF 170) | 1 | 92 |
| 177 | Harrisburg, PA (SCF 170) | 5 | 44 |
| 178 | Harrisburg, PA (SCF 170) | 21 | 60 |
| 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.