Home > PA > Northampton County > Bethlehem > Zip 18020

Zip Code 18020 — Bethlehem, PA

18020 is a ZIP Code associated with Bethlehem, PA, located within Northampton. The postal region supports an estimated population of 21,204 residents across Data Pending housing units, with a population density of 628.9 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.672670, -75.326920)

Data MetricLocal Statistic
Postal / Zip Code18020
Primary CityBethlehem
State / ProvincePA
CountyNorthampton
Total Population21,204
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density628.9 people/sq mi
TimezoneAmerica/New_York

How 18020 Compares

MetricZIP 18020Northampton CountyPA State Average
Population21,204310,52713,018,637
Median IncomeData PendingN/AN/A
Population Density628.9 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 18045Easton3.0 mi30,429N/A
Zip 18017Bethlehem3.3 mi40,640N/A
Zip 18018Bethlehem4.7 mi32,965N/A
Zip 18042Easton5.6 mi45,532N/A
Zip 18064Nazareth5.9 mi26,970N/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 →