ZIP code 18103
Where is ZIP code 18103?
Allentown, Pennsylvania
Lehigh County · Standard ZIP code
ZIP code 18103 belongs to Allentown, Pennsylvania in Lehigh County. 18103 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 484, 610 and 835. About 48,746 people live in the 18103 area, where the median household income is $72,895. The closest ZIP codes are 18025 (Bethlehem, 0.9 mi north), 18101 (Allentown, 1 mi north) and 18102 (Allentown, 1.4 mi northwest).
| ZIP code | 18103 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Allentown |
| State | Pennsylvania (PA) |
| County | Lehigh County |
| Time zone | Eastern Time · now |
| Area codes | 484, 610, 835 |
| Coordinates | 40.5891, -75.4645 map |
| 3-digit prefix | 181 |
Population and income in 18103
| Population | 48,746 · higher than 99% of Pennsylvania ZIP codes |
|---|---|
| People per square mile | 2,841 · higher than 89% of Pennsylvania ZIP codes |
| Median age | 39.1 years · lower than 77% of Pennsylvania ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $72,895 · higher than 53% of Pennsylvania ZIP codes |
| Income per person | $40,738 |
| Below the poverty line | 10% |
| Bachelor’s degree or higher | 28% of adults 25+ |
| Median home value | $272,700 · higher than 76% of Pennsylvania ZIP codes |
| Median rent | $1,368 a month |
| Housing units | 19,775 |
| Households | 18,880 (2.54 people on average) |
| Owners / renters | 63% / 37% |
| Land area | 17.16 sq mi (plus 0.11 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 18103. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 18103
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 18025 | Bethlehem, PA | 0.9 mi N | Unique |
| 18101 | Allentown, PA | 1 mi N | Standard |
| 18102 | Allentown, PA | 1.4 mi NW | Standard |
| 18105 | Allentown, PA | 1.9 mi NW | PO Box only |
| 18104 | Allentown, PA | 3.2 mi W | Standard |
| 18109 | Allentown, PA | 3.5 mi N | Standard |
| 18098 | Emmaus, PA | 3.8 mi SW | Unique |
| 18099 | Emmaus, PA | 3.8 mi SW | Unique |
| 18034 | Center Valley, PA | 4 mi SE | Standard |
| 18002 | Lehigh Valley, PA | 4.1 mi NE | PO Box only |
| 18003 | Lehigh Valley, PA | 4.1 mi NE | Unique |
| 18001 | Lehigh Valley, PA | 4.2 mi NE | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 18103 or measure the distance to another ZIP code.
How to address mail to 18103
123 MAIN ST
ALLENTOWN PA 18103
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (18103-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Allentown, PA
All Allentown ZIP codes with population and income →
Questions
- What city is ZIP code 18103?
- 18103 is a Allentown, Pennsylvania ZIP code.
- What county is 18103 in?
- ZIP code 18103 is in Lehigh County, Pennsylvania.
- What time zone is ZIP code 18103 in?
- 18103 is in the Eastern Time zone (America/New_York).
- What area code is 18103?
- Phone numbers in ZIP code 18103 use area codes 484, 610 and 835.
- What is the population of ZIP code 18103?
- About 48,746 people live in ZIP code 18103, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 18103?
- The median household income in 18103 is $72,895 a year, higher than 53% of Pennsylvania ZIP codes.
- What ZIP codes are near 18103?
- The nearest ZIP codes to 18103 are 18025 (Bethlehem, 0.9 miles), 18101 (Allentown, 1 miles), 18102 (Allentown, 1.4 miles) and 18105 (Allentown, 1.9 miles).