County ZIP codes · Pennsylvania · FIPS 42077
Lehigh County, PA ZIP Codes
Lehigh County, Pennsylvania has 41 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 35 residential and 6 for PO boxes or a single organization. 28 of the residential ones lie mainly in Lehigh County and 7 mainly in a neighboring county; 14 cross the county line. Median household income ranges from $43,085 in 18102 (Allentown) to $153,200 in 18034 (Center Valley) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Lehigh 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 $74,522 and $109,115.
They carry 27 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 35 residential ZIP codes in Lehigh County
28 ZIP codes lie mainly in Lehigh County; 7 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 18102 | Allentown | 51,001 | 17,103 | $43k | $163k | 100% |
| 18103 | Allentown | 48,746 | 2,841 | $73k | $273k | 100% |
| 18104 | Allentown | 48,683 | 2,121 | $95k | $336k | 100% |
| 18018 | Bethlehem | 32,965 | 6,374 | $75k | $251k | 66% |
| 18052 | Whitehall | 29,451 | 2,310 | $76k | $263k | 100% |
| 18062 | Macungie | 27,110 | 1,292 | $111k | $380k | 70% |
| 18049 | Emmaus | 18,941 | 1,263 | $94k | $316k | 100% |
| 18109 | Allentown | 18,446 | 2,236 | $58k | $199k | 95% |
| 18036 | Coopersburg | 15,581 | 534 | $129k | $416k | 62% |
| 18031 | Breinigsville | 11,570 | 831 | $114k | $373k | 99% |
| 18080 | Slatington | 11,226 | 372 | $75k | $264k | 100% |
| 18032 | Catasauqua | 9,555 | 4,754 | $81k | $223k | 64% |
| 18034 | Center Valley | 9,209 | 836 | $153k | $476k | 100% |
| 18069 | Orefield | 8,515 | 602 | $118k | $425k | 100% |
| 18078 | Schnecksville | 7,857 | 505 | $121k | $385k | 100% |
| 18037 | Coplay | 7,472 | 982 | $84k | $257k | 100% |
| 18106 | Allentown | 6,226 | 782 | $93k | $412k | 100% |
| 18101 | Allentown | 6,120 | 19,935 | $45k | $171k | 100% |
| 18066 | New Tripoli | 6,102 | 138 | $109k | $328k | 100% |
| 18051 | Fogelsville | 3,624 | 453 | $140k | $460k | 100% |
| 18092 | Zionsville | 3,230 | 215 | $113k | $422k | 92% |
| 18053 | Germansville | 2,344 | 128 | $83k | $303k | 100% |
| 18059 | Laurys Station | 744 | 462 | $168k | $431k | 100% |
| 18087 | Trexlertown | 590 | 557 | $73k | $346k | 100% |
| 18065 | Neffs | 577 | 3,455 | – | – | 100% |
| 18079 | Slatedale | 303 | 1,222 | $96k | $213k | 100% |
| 18046 | East Texas | 201 | 11,167 | – | – | 100% |
| 18195 | Allentown | no residents | 0 | – | – | 100% |
Partly in Lehigh County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 18015 | Bethlehem | 34,852 | 1,503 | $61k | $282k | 35% |
| 19529 | Kempton | 3,109 | 58 | $94k | $386k | 34% |
| 18041 | East Greenville | 5,768 | 454 | $99k | $318k | 28% |
| 18011 | Alburtis | 5,338 | 312 | $104k | $296k | 23% |
| 19530 | Kutztown | 15,573 | 285 | $72k | $293k | 10% |
| 18017 | Bethlehem | 40,640 | 2,425 | $91k | $336k | 5% |
| 19539 | Mertztown | 3,823 | 177 | $108k | $267k | 5% |
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?
14 ZIP codes of Lehigh County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Lehigh | Elsewhere |
|---|---|---|
| 18017 | 5% | Northampton County 95% |
| 18015 | 35% | Northampton County 65% |
| 18018 | 66% | Northampton County 34% |
| 18062 | 70% | Berks County 30% |
| 18109 | 95% | Northampton County 5% |
| 18036 | 62% | Bucks County 38% |
| 19530 | 10% | Berks County 90% |
| 18031 | 99% | Berks County 1% |
| 18032 | 64% | Northampton County 36% |
| 18041 | 28% | Montgomery County 64%; Bucks County 5%; Berks County 3% |
| 18011 | 23% | Berks County 77% |
| 19539 | 5% | Berks County 95% |
| 18092 | 92% | Berks County 8% |
| 19529 | 34% | Berks County 66% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Lehigh County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Lehigh County's ZIP codes use 3 prefixes: 180, 181 and 195.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 180 | Lehigh Valley, PA (SCF 180) | 30 | 68 |
| 181 | Lehigh Valley, PA (SCF 180) | 8 | 8 |
| 195 | Harrisburg, PA (SCF 170) | 3 | 44 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.