Home > MA > Middlesex County > Belmont > Zip 02478

Zip Code 02478 — Belmont, MA

02478 is a ZIP Code associated with Belmont, MA, located within Middlesex. The postal region supports an estimated population of 27,175 residents across Data Pending housing units, with a population density of 2,258.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.396020, -71.179550)

Data MetricLocal Statistic
Postal / Zip Code02478
Primary CityBelmont
State / ProvinceMA
CountyMiddlesex
Total Population27,175
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2,258.7 people/sq mi
TimezoneAmerica/New_York

How 02478 Compares

MetricZIP 02478Middlesex CountyMA State Average
Population27,1751,629,2777,043,978
Median IncomeData PendingN/AN/A
Population Density2,258.7 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 02476Arlington1.4 mi17,708N/A
Zip 02472Watertown1.8 mi35,620N/A
Zip 02474Arlington2.1 mi28,642N/A
Zip 02452Waltham2.1 mi15,808N/A
Zip 02140Cambridge2.4 mi21,204N/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 →