ZIP Code 01258 — South Egremont, MA
01258 is a standard (street delivery) ZIP code serving South Egremont, Massachusetts, in Berkshire 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 01258 at a glance
| ZIP code | 01258 |
|---|---|
| Primary city | South Egremont |
| State | Massachusetts (MA) |
| County | Berkshire FIPS 25003 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 193 |
| Coordinates | 42.093960, -73.466160 |
How ZIP+4 works in 01258
The four digits after the hyphen encode a delivery segment inside 01258. 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 01258 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 01258.
| ZIP | City | Distance |
|---|---|---|
| 12517 | Copake Falls, NY | 3.6 mi |
| 12516 | Copake, NY | 4.6 mi |
| 01257 | Sheffield, MA | 4.8 mi |
| 06079 | Taconic, CT | 5 mi |
| 06068 | Salisbury, CT | 6 mi |
| 12503 | Ancramdale, NY | 7.1 mi |
| 01222 | Ashley Falls, MA | 7.7 mi |
| 01230 | Great Barrington, MA | 8.8 mi |
| 12529 | Hillsdale, NY | 9 mi |
| 12546 | Millerton, NY | 9.5 mi |
| 06018 | Canaan, CT | 9.7 mi |
| 12502 | Ancram, NY | 9.7 mi |
Questions about 01258
What is the ZIP+4 code for 01258?
01258 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 01258, you need to look up a specific street address to get them.
What city is 01258?
01258 is assigned to South Egremont, Massachusetts, in Berkshire 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.