ZIP code 01821
Where is ZIP code 01821?
Billerica, Massachusetts
Middlesex County · Standard ZIP code
ZIP code 01821 belongs to Billerica, Massachusetts in Middlesex County. 01821 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 339, 351, 781 and 978. About 30,143 people live in the 01821 area, where the median household income is $149,042. The closest ZIP codes are 01822 (Billerica, 1 mi northwest), 01865 (Nutting Lake, 1.3 mi southwest) and 01866 (Pinehurst, 2 mi southeast).
| ZIP code | 01821 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Billerica |
| State | Massachusetts (MA) |
| County | Middlesex County |
| Time zone | Eastern Time · now |
| Area codes | 339, 351, 781, 978 |
| Coordinates | 42.5519, -71.2518 map |
| 3-digit prefix | 018 |
Population and income in 01821
| Population | 30,143 · higher than 89% of Massachusetts ZIP codes |
|---|---|
| People per square mile | 1,817 · higher than 69% of Massachusetts ZIP codes |
| Median age | 44.3 years · higher than 56% of Massachusetts ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $149,042 · higher than 83% of Massachusetts ZIP codes |
| Income per person | $61,572 |
| Below the poverty line | 5.3% |
| Bachelor’s degree or higher | 40% of adults 25+ |
| Median home value | $615,100 · higher than 62% of Massachusetts ZIP codes |
| Median rent | $2,346 a month |
| Housing units | 11,430 |
| Households | 11,312 (2.65 people on average) |
| Owners / renters | 82% / 18% |
| Land area | 16.59 sq mi (plus 0.4 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 01821. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 01821
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 01822 | Billerica, MA | 1 mi NW | PO Box only |
| 01865 | Nutting Lake, MA | 1.3 mi SW | PO Box only |
| 01866 | Pinehurst, MA | 2 mi SE | PO Box only |
| 01862 | North Billerica, MA | 2.6 mi NW | Standard |
| 01876 | Tewksbury, MA | 3.8 mi N | Standard |
| 01803 | Burlington, MA | 4 mi SE | Standard |
| 01887 | Wilmington, MA | 4.1 mi E | Standard |
| 01805 | Burlington, MA | 4.3 mi SE | Unique |
| 01730 | Bedford, MA | 4.8 mi S | Standard |
| 01741 | Carlisle, MA | 5.3 mi W | Standard |
| 01824 | Chelmsford, MA | 5.9 mi NW | Standard |
| 01852 | Lowell, MA | 6.2 mi NW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 01821 or measure the distance to another ZIP code.
How to address mail to 01821
123 MAIN ST
BILLERICA MA 01821
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (01821-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Billerica, MA
All Billerica ZIP codes with population and income →
Questions
- What city is ZIP code 01821?
- 01821 is a Billerica, Massachusetts ZIP code.
- What county is 01821 in?
- ZIP code 01821 is in Middlesex County, Massachusetts.
- What time zone is ZIP code 01821 in?
- 01821 is in the Eastern Time zone (America/New_York).
- What area code is 01821?
- Phone numbers in ZIP code 01821 use area codes 339, 351, 781 and 978.
- What is the population of ZIP code 01821?
- About 30,143 people live in ZIP code 01821, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 01821?
- The median household income in 01821 is $149,042 a year, higher than 83% of Massachusetts ZIP codes.
- What ZIP codes are near 01821?
- The nearest ZIP codes to 01821 are 01822 (Billerica, 1 miles), 01865 (Nutting Lake, 1.3 miles), 01866 (Pinehurst, 2 miles) and 01862 (North Billerica, 2.6 miles).