ZIP Code 01529 — Millville, MA
01529 is a standard (street delivery) ZIP code serving Millville, Massachusetts, in Worcester 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 01529 at a glance
| ZIP code | 01529 |
|---|---|
| Primary city | Millville |
| State | Massachusetts (MA) |
| County | Worcester FIPS 25027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,160 |
| Coordinates | 42.039060, -71.577670 |
How ZIP+4 works in 01529
The four digits after the hyphen encode a delivery segment inside 01529. 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 01529 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.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 01529.
| ZIP | City | Distance |
|---|---|---|
| 01504 | Blackstone, MA | 2.4 mi |
| 02876 | Slatersville, RI | 2.8 mi |
| 02824 | Forestdale, RI | 2.8 mi |
| 01569 | Uxbridge, MA | 3.4 mi |
| 01756 | Mendon, MA | 4 mi |
| 02896 | North Smithfield, RI | 4.8 mi |
| 02895 | Woonsocket, RI | 4.8 mi |
| 02826 | Glendale, RI | 5.2 mi |
| 01525 | Linwood, MA | 5.3 mi |
| 02830 | Harrisville, RI | 5.4 mi |
| 02019 | Bellingham, MA | 5.9 mi |
| 01747 | Hopedale, MA | 6.3 mi |
Questions about 01529
What is the ZIP+4 code for 01529?
01529 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 01529, you need to look up a specific street address to get them.
What city is 01529?
01529 is assigned to Millville, Massachusetts, in Worcester 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.