ZIP Code 02170 — Quincy, MA
02170 is a standard (street delivery) ZIP code serving Quincy, Massachusetts, in Norfolk County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 02170 at a glance
| ZIP code | 02170 |
|---|---|
| Primary city | Quincy |
| State | Massachusetts (MA) |
| County | Norfolk FIPS 25021 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 18,809 |
| Coordinates | 42.266440, -71.016210 |
How ZIP+4 works in 02170
The four digits after the hyphen encode a delivery segment inside 02170. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 02170 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Other ZIP codes in Quincy
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 02170.
| ZIP | City | Distance |
|---|---|---|
| 02171 | Quincy, MA | 1.5 mi |
| 02169 | Quincy, MA | 1.8 mi |
| 02122 | Dorchester, MA | 2.6 mi |
| 02124 | Dorchester Center, MA | 3.1 mi |
| 02126 | Mattapan, MA | 3.9 mi |
| 02191 | North Weymouth, MA | 4 mi |
| 02186 | Milton, MA | 4 mi |
| 02125 | Dorchester, MA | 4 mi |
| 02184 | Braintree, MA | 4.4 mi |
| 02121 | Dorchester, MA | 4.5 mi |
| 02127 | South Boston, MA | 4.8 mi |
| 02188 | Weymouth, MA | 5.1 mi |
Questions about 02170
What is the ZIP+4 code for 02170?
02170 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 02170, you need to look up a specific street address to get them.
What city is 02170?
02170 is assigned to Quincy, Massachusetts, in Norfolk County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.