ZIP Code 01821
Billerica · Middlesex, Massachusetts
01821 is the ZIP code of Billerica in Middlesex, Massachusetts, United States.
- ZIP Code
- 01821
- County
- Middlesex
- State
- Massachusetts
- Country
- United States
Place with ZIP code 01821
| Place | County | Location |
|---|---|---|
| Billerica | Middlesex | 42.552, -71.252 |
Near Boston
The nearest major city is Boston, about 27 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 01821?
Billerica.
Which county and state is 01821 in?
Middlesex, Massachusetts, United States.
What is the nearest major city to 01821?
Boston, about 27 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.