ZIP Code 03054 — Merrimack, NH
03054 is a standard (street delivery) ZIP code serving Merrimack, New Hampshire, in Hillsborough 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 03054 at a glance
| ZIP code | 03054 |
|---|---|
| Primary city | Merrimack |
| State | New Hampshire (NH) |
| County | Hillsborough FIPS 33011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 28,176 |
| Coordinates | 42.854710, -71.518780 |
How ZIP+4 works in 03054
The four digits after the hyphen encode a delivery segment inside 03054. 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 03054 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 03054.
| ZIP | City | Distance |
|---|---|---|
| 03052 | Litchfield, NH | 3.3 mi |
| 03031 | Amherst, NH | 4.6 mi |
| 03063 | Nashua, NH | 5.2 mi |
| 03064 | Nashua, NH | 5.7 mi |
| 03110 | Bedford, NH | 6 mi |
| 03053 | Londonderry, NH | 6.9 mi |
| 03103 | Manchester, NH | 7.9 mi |
| 03049 | Hollis, NH | 8 mi |
| 03055 | Milford, NH | 8.2 mi |
| 03060 | Nashua, NH | 8.4 mi |
| 03051 | Hudson, NH | 8.4 mi |
| 03057 | Mont Vernon, NH | 9.1 mi |
Questions about 03054
What is the ZIP+4 code for 03054?
03054 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 03054, you need to look up a specific street address to get them.
What city is 03054?
03054 is assigned to Merrimack, New Hampshire, in Hillsborough 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.