Billerica ZIP Code Coverage
Four Billerica postal anchors are confirmed by USPS facility pages: 01821, 01862, 01865, and 01866. They are useful starting labels, not drawn municipal borders. The mailing-city label on a USPS result may say Billerica, North Billerica, Nutting Lake, or Pinehurst. The Town of Billerica uses a different civic vocabulary, including Pinehurst, Nutting Lake, Town Center, North Billerica, East Billerica, and West Billerica. A delivery result for the particular street address controls the final postal answer.
| ZIP | Areas Covered | Post Office | Notes |
|---|---|---|---|
| 01821 | Billerica mailing label | Billerica Post Office | USPS facility anchor; verify an individual address. |
| 01862 | North Billerica mailing label | North Billerica Post Office | Postal label is not a town-boundary ruling. |
| 01865 | Nutting Lake mailing label | Nutting Lake Post Office | Facility page identifies retail and PO Box service. |
| 01866 | Pinehurst mailing label | Pinehurst station | Confirm the street and delivery point through USPS. |
The state table reviewed during research also listed 01822 beside Billerica. Its current USPS city-by-ZIP result was not captured, so it is not a verified directory facet here. It may be a delivery, special-use, or table artifact question. Treat it as unresolved until USPS returns an address-level answer rather than adding it to a general search filter.
Billerica Postal Labels and ZIP Codes
The USPS lookup has three useful modes: By Address, By City and State, and Cities by ZIP. By Address is the reliable mode for a known delivery point because it accepts a street with city and state, or a street with ZIP. City and State can help produce possibilities, while Cities by ZIP shows the postal city association. None of those modes turns a community nickname into a legal boundary.
The USPS ZIP Code Lookup is the first place to test the spelling, street number, unit, and city-state combination. It is especially important around North Billerica, Nutting Lake, and Pinehurst, because facility names describe postal service locations. A civic-area label can guide local context, but it should not replace the USPS-standardized address.
A captured view of the USPS address tool is available from the official ZIP lookup.
The three-mode display is a reminder to select the lookup that matches the question, with an individual address taking priority over a broad place-name search.
Billerica ZIP Code Facility Anchors
Facility pages give each verified code a concrete USPS reference. The Billerica Post Office is associated with 01821, North Billerica with 01862, Nutting Lake with 01865, and Pinehurst with 01866. Posted hours and services can change, so use the live facility page before a visit. The facility pages help check a postal label, but they do not define which side of a town or neighborhood line an address occupies.
The Billerica Post Office page supplies the 01821 facility reference.
Use the postal page as a service-location check, then return to the address lookup for a specific delivery result.
The North Billerica Post Office page documents the 01862 facility.
North Billerica is a USPS mailing label and a local community reference, not a substitute for a parcel or civic-boundary record.
Narrow a Billerica ZIP Code Search
A ZIP can reduce the range of a current-record search, yet Billerica sources use different keys. Patriot Properties is a municipal assessment information source. The Registry is the recorded title source. The individual voter-status tool uses a name, date of birth, and five-digit ZIP, and does not open a public browse of every person in a ZIP. Start with the exact delivery result, record its date, and match the record source to the question.
- Enter the full street address in USPS By Address and save the standardized ZIP result.
- Use the ZIP as a location check when opening the Billerica assessment portal; confirm the parcel through its map-lot and tax-year details.
- For an individual civic-status question, use the state voter search with the registered name, date of birth, and ZIP. A moved person may require an older ZIP.
- Use the town, owner name, recorded date, plan, or book reference in the Registry when the question concerns a recorded instrument rather than postal delivery.
- When the ZIP identifies a smaller area but the question becomes street-specific, move to the Billerica street directory for the address-record trail.
Research did not capture exact Patriot Properties field labels or a current ZIP filter. The portal should therefore be checked live for its available fields. Its assessment result is still not a deed or a survey, and a voter-status result remains a dated status snapshot rather than an address roster.
Billerica ZIP Code Lookup Fields
The USPS interface documents enough fields to make a careful lookup repeatable. Use the complete address mode whenever possible. City and State, or Cities by ZIP, can help orient a search but should not override a response tied to the actual street. Keeping the returned ZIP+4, postal city label, and search date alongside a record citation prevents a later reader from mistaking a broad postal association for a confirmed address.
| Field | Use |
|---|---|
| Lookup mode | By Address, By City and State, or Cities by ZIP. |
| Address input | Street address with city and state, or street address with ZIP. |
| City and State input | Use to identify postal possibilities, not to settle a particular delivery point. |
| ZIP result | Record the five-digit ZIP and ZIP+4 when USPS returns it for the actual address. |
Note: A ZIP result identifies a mailing convention for the searched address, not a statement about ownership, municipal jurisdiction, or a historic household.
Billerica ZIP Code Boundaries and Civic Areas
Billerica community labels and postal labels overlap without being interchangeable. The town identifies Pinehurst, Nutting Lake, Town Center, North Billerica, East Billerica, and West Billerica as local areas. A deed identifies the recorded land transaction and legal description. An assessor map is a tax-map representation for orientation. USPS establishes the delivery convention. Each source answers a different question, and none should be silently promoted into another source's role.
Boundary limit. A Billerica ZIP code is not a city-limit line. Confirm delivery through USPS, parcel context through the assessor or map, and recorded boundaries through the Registry or a survey when legal precision matters.
The town's community description is useful for naming local areas. The Assessors Office identifies its assessment role and links the current property-information portal. Neither source changes a USPS delivery response.
Billerica ZIP Codes and Census ZCTAs
Census ZIP Code Tabulation Areas, commonly called ZCTAs, are statistical approximations. They are useful for comparing broad geography, yet they are not USPS carrier routes or delivery boundaries. A ZCTA can help describe a data area, but it cannot validate a mailbox, decide a mailing city, or establish where a parcel lies. This distinction matters when a historical directory uses an older place label and a modern data map seems more precise than it is.
The captured Census TIGERweb ZCTA reference shows the statistical layer used for comparison.
The Census presentation is helpful for context, while the USPS address result remains the postal authority for a delivery point.
Billerica ZIP Code Names in Practice
Nutting Lake and Pinehurst are useful examples of why a postal label needs context. They are community names in Billerica and names on USPS facility pages, but the facility page does not draw a neighborhood edge. The live Nutting Lake facility page anchors 01865.
The 01865 page supports the postal anchor while leaving the address-level lookup to USPS.
The Pinehurst station page provides the corresponding 01866 reference.
The Pinehurst display reinforces the same rule: a postal service location can help orient a search but does not decide the civic or parcel boundary.
Billerica ZIP Code Definitions
Postal terms can look more exact than they are. These short definitions keep a Billerica ZIP code directory search in its proper lane and make it easier to preserve the source behind a result.
- ZIP code
- A five-digit USPS delivery-area code. It is a postal routing tool, not a municipal or parcel boundary.
- ZIP+4
- An added four digits USPS may return for a more specific delivery segment, such as a block, building, or unit range.
- PO Box ZIP
- A ZIP used for post-office boxes or particular postal service, which should not be assumed to cover nearby street delivery.
- Carrier route
- A postal delivery grouping used to organize mail distribution. It is not a census tract, deed boundary, or neighborhood line.
Note: Older Billerica directories may omit ZIPs or use a town heading, so do not project a current ZIP onto an earlier address without another dated source.
Numbers Behind Billerica ZIP Codes
Billerica's official community page reports 42,119 residents in the 2020 Census across 26.4 square miles. Those figures offer scale, not proof that any ZIP contains a fixed share of the town. Postal patterns cut across civic geography, and no per-ZIP population or municipal-registration count was established in the research. The useful number for an address search is the USPS result tied to the address, together with its date.
The four verified USPS facility anchors make the postal landscape easier to check. They do not authorize a fifth facet for 01822, and they do not turn facility labels into official neighborhood maps. This is why a Billerica ZIP code directory works best as a routing layer before a source-specific record search.