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ZIP code

01821

Billerica, MA

STANDARD

01821 covers Billerica in Middlesex County, with 30,203 people in the ACS 2023 estimate.

Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology

ACS 2023 population

30,203

Median household income

$142,564

Median home value

$581,300

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 01821. Methodology

ZIP code map of 01821

Census ZCTA boundary for ZIP 01821 in Billerica, Massachusetts
Census ZCTA boundary for ZIP 01821 in Billerica, Massachusetts. A ZCTA is not the same as a USPS ZIP code. Boundaries: U.S. Census Bureau. Methodology · Data sources
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About ZIP code 01821

Type

STANDARD

City

Billerica

County

Middlesex County

Timezone

America/New_York

Area codes

339, 351, 781, 978

Land area

16.6 sq mi

Water area

0.40 sq mi

Households

11,666

Median gross rent

$2,211

More enterprise fields

Timezone
America/New_York
Area Codes
339, 351, 781, 978
World Region
NA
Country
US

Commercial ZIP directory · not ACS

Commercial ZIP directory population_count for ZCTA 01821. Not ACS. Methodology

People in 01821

Race

  • White25,158
  • Black or African American1,115
  • American Indian or Alaska Native58
  • Asian2,545
  • Native Hawaiian and Pacific Islander4
  • Other race557
  • Two or more races1,472

Hispanic or Latino (any race): 1,076

Age

  • Under 103,076
  • 10 to 193,472
  • 20 to 293,646
  • 30 to 394,225
  • 40 to 493,806
  • 50 to 594,949
  • 60 to 693,967
  • 70 to 792,563
  • 80 and older1,205

Income and housing in 01821

Poverty rate

4.1%

Median earnings

$65,056

Median household income

$142,564

Median home value

$581,300

Median gross rent

$2,211

Education

  • High school graduate94.7%
  • Bachelor's degree41.7%
  • Graduate degree16.4%

Places covering 01821

Cities and places — Population overlap

Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

Counties — Population overlap

Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.

ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

76.2% of this ZIP is outside city limits (a real overlap row, not missing data).

Population history for 01821

IRS populationACS population
35,65717,829020052023

Hover the chart or read the table below (Year | ACS | IRS).

Population history. Year | ACS population | IRS population. ACS and IRS are separate series. Blank cells mean that source did not publish a count for the year.
YearACS populationIRS population
200529,814
200628,494
200730,015
200829,328
200929,164
201029,200
201130,16829,527
201230,56929,550
201330,59129,690
201431,15729,630
201531,60729,980
201631,78029,660
201732,34829,760
201833,01629,760
201932,79729,450
202032,93629,650
202131,49929,160
202230,85429,580
202330,203

ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.

ZIP codes near 01821

12 nearest ZIP centroids (any distance)

  1. 01862North Billerica3.0 miPop 11,703 · Income $131,214
  2. 01730Bedford3.8 miPop 14,478 · Income $158,286
  3. 01803Burlington4.1 miPop 26,068 · Income $142,421
  4. 01876Tewksbury4.5 miPop 30,962 · Income $126,795
  5. 01887Wilmington4.6 miPop 23,195 · Income $161,473
  6. 01741Carlisle5.6 miPop 5,209 · Income $250,000+
  7. 01824Chelmsford6.0 miPop 26,628 · Income $141,337
  8. 01731Hanscom AFB6.1 miPop 1,745 · Income $101,194
  9. 01852Lowell6.2 miPop 36,700 · Income $77,058
  10. 02420Lexington6.5 miPop 16,287 · Income $233,068
  11. 01801Woburn6.5 miPop 41,205 · Income $107,754
  12. 01851Lowell6.9 miPop 32,308 · Income $87,962

ZIP centroids within 2 miles

No other ZIP codes within 2 miles of 01821, measured by Census internal-point centroids. Try a wider radius.

ZIPs within 2 miles of this place

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01821 Billerica, MA

Looking up ZIP codes within 2 miles of 01821 Billerica, MA, measured by centroid distance.

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ZIP code 01821 FAQ

What city is ZIP code 01821 in?
01821 is in Billerica, MA.
What county is 01821 in?
01821 is in Middlesex County.
What is the median household income in 01821?
The median household income in 01821 is $142,564.
Which ZIP codes are near 01821?
Use the radius tool on this page to list ZIP codes within a chosen distance of 01821.