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ZIP code 01821

Billerica, MA · Middlesex County

About ZIP code 01821

  • ZIP code 01821 is in Billerica, Middlesex County, Massachusetts.
  • About 30,143 people live in it, which is 701.4 people per square mile.
  • Time zone: Eastern Standard Time.
  • The middle of the ZIP code is at 42.550, -71.252.

A ZIP code is a mail delivery area, not a town border, and one ZIP code can cover parts of several towns. To check a single address, use the US Postal Service lookup.

Billerica, MA

ZIP code 01821 is the post office name for Billerica, Middlesex County, MA. 42,003 people live in Billerica. Typical household income is $148,200. A typical home costs $612,000.

  • Stronger than most towns on: Long, healthy lives, Home internet and working from home and Public transit.
  • Weaker than most towns on: Cost of living, State taxes and Pleasant weather for being outdoors.

See all figures for Billerica

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ZIP code list from SimpleMaps US Zips. Population is a US Census Bureau estimate. These are estimates, so check official sources before you decide.