18101 ZIP Code, Allentown, PA
18101 is a ZIP code in Allentown, Pennsylvania in Lehigh County. It covers 0.3 square miles of land. The closest ZIP codes are 18102, 18103 and 18109. 6,120 people live here in 2,576 households. It is densely built, at about 19,935 people per square mile, and most households rent (8% own). Median household income is $44,773, well below the Pennsylvania median of $77,971; the median age is 29.1, younger than most ZIP codes.
Quick facts
- Mailing city: Allentown, PA
- County: Lehigh County
- Land area: 0.3 sq mi
- Population: 6,120
- Median household income: $44,773
Key figures
| Measure | Value |
|---|---|
| Residents | 6,120 |
| Households | 2,576 |
| Median household income | $44,773 |
| Income per person | $28,551 |
| Median age | 29.1 |
| Homeowners | 8.3% |
| Median home value | $171,300 |
| Median rent | $1,430 |
| Bachelor's degree or higher | 23.2% |
| Average commute (minutes) | 28.8 |
| Households with kids under 18 | 25.0% |
| Moved in the past year | 20.0% |
| Below the poverty line | 22.8% |
| Broadband internet | 87.7% |
| Speak a non-English language at home | 42.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 6.4% |
| $10–15K | 5.2% |
| $15–25K | 10.1% |
| $25–35K | 16.5% |
| $35–50K | 16.0% |
| $50–75K | 18.1% |
| $75–100K | 10.4% |
| $100–150K | 8.9% |
| $150–200K | 7.1% |
| $200K+ | 1.4% |
Age
| % of all residents | Value |
|---|---|
| <10 | 8.9% |
| 10–19 | 11.7% |
| 20–24 | 14.2% |
| 25–34 | 28.5% |
| 35–44 | 14.1% |
| 45–54 | 10.0% |
| 55–64 | 7.1% |
| 65–74 | 3.7% |
| 75+ | 1.6% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 3.3% |
| Owned outright | 4.4% |
| Rented | 84.7% |
| Vacant | 7.5% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 4.2% |
| Townhome | 12.2% |
| 2–4 units | 20.9% |
| 5–19 units | 16.7% |
| 20+ units | 45.9% |
| Mobile / other | 0.0% |
Businesses in 18101
329 business establishments with 5,736 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 67
- Accommodation and Food Services: 41
- Health Care and Social Assistance: 36
- Retail Trade: 35
- Finance and Insurance: 33
- Other Services (except Public Administration): 25
- Real Estate and Rental and Leasing: 16
- Administrative and Support and Waste Management and Remediation Services: 16
EDDM carrier routes
See every USPS carrier route in 18101 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 18102 — Allentown city, PA (0.5 mi)
- 18103 — Allentown city, PA (2.5 mi)
- 18109 — Allentown city, PA (2.7 mi)
- 18032 — Catasauqua borough, PA (3.7 mi)
- 18104 — Allentown city, PA (4.1 mi)
- 18018 — Bethlehem city, PA (4.2 mi)
- 18052 — Fullerton CDP, PA (4.2 mi)
- 18034 — DeSales University CDP, PA (5 mi)
Areas that include 18101
- Allentown, PA ZIP codes — 7 ZIP codes
- Lehigh County ZIP codes — 32 ZIP codes
- Pennsylvania ZIP code data
Where it ranks
- No. 1 of 26: highest share of residents who moved in during the past year in Lehigh County
- No. 1 of 26: lowest median age in Lehigh County
- No. 1 of 26: fastest population growth in Lehigh County
- No. 5 of 6: highest median household income in Allentown, PA
- No. 5 of 6: highest median home value in Allentown, PA
- No. 1 of 6: highest share of residents who moved in during the past year in Allentown, PA
- No. 1 of 6: lowest median age in Allentown, PA
- No. 1 of 6: fastest population growth in Allentown, PA
Mail every home in 18101
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 18101, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 18101 in?
- 18101 is a Allentown, PA mailing address. By land area, 100% lies inside Allentown.
- What county is 18101 in?
- 18101 is in Lehigh County.
- What is the population of 18101?
- About 6,120 people (±787), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 5,108.
- What is the median household income in 18101?
- $44,773 (±$8,210), compared with $77,971 for Pennsylvania as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 18101?
- EDDM2GO's stored route library does not include 18101 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 18101?
- The closest, measured center to center: 18102 (0.5 mi, Allentown), 18103 (2.5 mi, Allentown), 18109 (2.7 mi, Allentown), 18032 (3.7 mi, Catasauqua borough, PA), 18104 (4.1 mi, Allentown) and 18018 (4.2 mi, Bethlehem).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.