| ZIP Code | 01821 |
|---|---|
| City | Billerica |
| State | Massachusetts (MA) |
| County | Middlesex County |
| Area Code | 508/978 |
| Elevation | 198 ft |
| Latitude | 42.54933 |
|---|---|
| Longitude | -71.251725 |
| Timezone | New York (DST) |
| FIPS | 25017 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 44.6 yrs ↑ 9% since 2019 |
|---|---|
| Avg Household Size | 2.61 |
| Below Poverty | 4.1% ▼ 60% below avg |
| College Grads | 53.1% ▲ 37% above avg |
| Unemployment | 3.0% ▼ 39% below avg |
| No HS Diploma | 279 (1.3%) |
| HS Graduate | 5,711 (26.2%) |
| Some College | 1,585 (7.3%) |
| Associates | 2,663 (12.2%) |
| Bachelors | 2,412 (11.1%) |
| Graduate Degree | 9,178 (42%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $142,564 ▲ 87% above avg ↑ 34% since 2019 |
|---|---|
| Median Home Value | $581,300 ▲ 109% above avg ↑ 42% since 2019 |
| Home/Income Ratio | 4.1x (nat avg ~3.5x) |
| Median Rent | $2,211/mo ↑ 41% since 2019 |
| Total Units | 11,666 |
| Vacant Units | 155 |
| Avg HH Size | 2.61 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 11,666 |
|---|---|
| Vacant | 155 |
| Owner Occupied | 81.1% |
| Renter Occupied | 18.9% |
| Avg HH Size | 2.61 |
ZIP code 01821 is located in Billerica, Massachusetts, within Middlesex County. With a population of 30,203, this is a moderately populated ZIP code with a middle-aged community — the median age is 44.6 years. Economically, 01821 is a upper-middle-income ZIP code: the median household income of $142,564 is significantly above the national average.
Real estate in ZIP code 01821 represents a premium housing market. The median home value of $581,300 is more than double the national average. Renters can expect to pay around $2,211 per month in median rent. Homeownership is strong here — 81.1% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 42% since 2019.
The population of 01821 is primarily White (79.79%). Residents are well-educated — 53.1% hold a bachelor's degree or higher, which is above the national average. Poverty affects a relatively small share of residents at 4.1%. Household income has grown by 34% since 2019.
The unemployment rate in 01821 stands at 3.0%, which is below the national average. About 20% of workers are remote. As in most parts of the country, driving alone is the dominant commute mode at 69%.
Overall, ZIP code 01821 in Billerica, MA is characterized as upper-middle-income, well-educated, a middle-aged community, and predominantly owner-occupied. With 30,203 residents, a median household income of $142,564, and a median home value of $581,300, it offers a clear picture of life in this part of Massachusetts.