Home > PA > Lehigh County > Allentown > Zip 18101

Zip Code 18101 — Allentown, PA

18101 is a ZIP Code associated with Allentown, PA, located within Lehigh. The postal region supports an estimated population of 6,120 residents across Data Pending housing units, with a population density of 7,694.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.603010, -75.469800)

Data MetricLocal Statistic
Postal / Zip Code18101
Primary CityAllentown
State / ProvincePA
CountyLehigh
Total Population6,120
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density7,694.6 people/sq mi
TimezoneAmerica/New_York

How 18101 Compares

MetricZIP 18101Lehigh CountyPA State Average
Population6,120386,38913,018,637
Median IncomeData PendingN/AN/A
Population Density7,694.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 18102Allentown0.5 mi51,001N/A
Zip 18103Allentown2.2 mi48,746N/A
Zip 18109Allentown2.8 mi18,446N/A
Zip 18032Catasauqua3.7 mi9,555N/A
Zip 18104Allentown4.1 mi48,683N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →