ZIP code 18109
Where is ZIP code 18109?
Allentown, Pennsylvania
Lehigh County · Standard ZIP code
ZIP code 18109 belongs to Allentown, Pennsylvania in Lehigh County. 18109 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 18,446 people live in the 18109 area, where the median household income is $58,031. The closest ZIP codes are 18002 (Lehigh Valley, 0.6 mi northeast), 18003 (Lehigh Valley, 0.6 mi northeast) and 18001 (Lehigh Valley, 0.7 mi northeast).
| ZIP code | 18109 |
|---|---|
| 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 | 40.6366, -75.4405 map |
| 3-digit prefix | 181 |
Population and income in 18109
| Population | 18,446 · higher than 88% of Pennsylvania ZIP codes |
|---|---|
| People per square mile | 2,236 · higher than 86% of Pennsylvania ZIP codes |
| Median age | 36.6 years · lower than 85% of Pennsylvania ZIP codes |
| Men / women | 50% / 50% |
| Median household income | $58,031 · lower than 79% of Pennsylvania ZIP codes |
| Income per person | $28,396 |
| Below the poverty line | 18% |
| Bachelor’s degree or higher | 16% of adults 25+ |
| Median home value | $198,800 · higher than 51% of Pennsylvania ZIP codes |
| Median rent | $1,331 a month |
| Housing units | 7,519 |
| Households | 7,030 (2.61 people on average) |
| Owners / renters | 52% / 48% |
| Land area | 8.25 sq mi (plus 0.23 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 18109. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 18109
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 18002 | Lehigh Valley, PA | 0.6 mi NE | PO Box only |
| 18003 | Lehigh Valley, PA | 0.6 mi NE | Unique |
| 18001 | Lehigh Valley, PA | 0.7 mi NE | PO Box only |
| 18032 | Catasauqua, PA | 2 mi NW | Standard |
| 18018 | Bethlehem, PA | 2.6 mi E | Standard |
| 18025 | Bethlehem, PA | 2.6 mi SW | Unique |
| 18101 | Allentown, PA | 2.8 mi SW | Standard |
| 18102 | Allentown, PA | 2.9 mi SW | Standard |
| 18017 | Bethlehem, PA | 3.2 mi NE | Standard |
| 18105 | Allentown, PA | 3.3 mi SW | PO Box only |
| 18103 | Allentown, PA | 3.5 mi S | Standard |
| 18052 | Whitehall, PA | 3.6 mi NW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 18109 or measure the distance to another ZIP code.
How to address mail to 18109
123 MAIN ST
ALLENTOWN PA 18109
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (18109-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 18109?
- 18109 is a Allentown, Pennsylvania ZIP code.
- What county is 18109 in?
- ZIP code 18109 is in Lehigh County, Pennsylvania.
- What time zone is ZIP code 18109 in?
- 18109 is in the Eastern Time zone (America/New_York).
- What area code is 18109?
- Phone numbers in ZIP code 18109 use area codes 484, 610 and 835.
- What is the population of ZIP code 18109?
- About 18,446 people live in ZIP code 18109, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 18109?
- The median household income in 18109 is $58,031 a year, lower than 79% of Pennsylvania ZIP codes.
- What ZIP codes are near 18109?
- The nearest ZIP codes to 18109 are 18002 (Lehigh Valley, 0.6 miles), 18003 (Lehigh Valley, 0.6 miles), 18001 (Lehigh Valley, 0.7 miles) and 18032 (Catasauqua, 2 miles).