US Gazetteer > Massachusetts Gazetteer > Massachusetts ZIP Codes > Billerica, MA 01821

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Billerica, MA 01821

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The 01821 ZIP Code is centered1 in Middlesex County at latitude 42.549 and longitude -71.248 (Panoramio Photos). It is a standard type ZIP Code. Middlesex County is in the Eastern Time Zone (UTC -5 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 01821 was 29,408 with 10,065 housing units; a land area land area of 17.21 sq. miles; a water area of 0.3 sq. miles; and a population density of 1,708.88 people per sq. mile for Census 2000. Demographic Profile

Billerica, MA 01821 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

The Pines, MA (1.4 miles ESE)
Nutting Lake, MA (1.4 miles SW)
Billerica, MA (1.4 miles WNW)
Pinehurst, MA (1.9 miles SE)
Pattenville, MA (2.4 miles NNE)
Bedford Springs, MA (2.4 miles SSW)
East Billerica, MA (2.4 miles NNE)
River Pines, MA (2.4 miles WNW)
South Billerica, MA (2.4 miles SW)
Rio Vista, MA (3.1 miles W)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

Fox Hill, MA (3.1 miles ESE)
Chelmsford Center, MA (6.3 miles WNW)
Shaker Glen, MA (7 miles SSE)
Fuller Heights, MA (7.4 miles SSE)
Plain, MA (7.7 miles SW)
Princeton Village, MA (7.9 miles NW)
Idylwide, MA (8 miles S)
Sutherland Woods, MA (9.1 miles SSE)
Village of Nagog Woods, MA (9.5 miles WSW)
Haywardville, MA (9.9 miles SE)

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.

1 Keeping the above key concepts in mind, what we informally refer to as the "center" of a ZIP Code is most often actually the centroid of a polygon.