ZIP Code 55042 — Lake Elmo, MN
55042 is a standard (street delivery) ZIP code serving Lake Elmo, Minnesota, in Washington 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 55042 at a glance
| ZIP code | 55042 |
|---|---|
| Primary city | Lake Elmo |
| State | Minnesota (MN) |
| County | Washington FIPS 27163 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 13,705 |
| Coordinates | 44.992530, -92.898000 |
How ZIP+4 works in 55042
The four digits after the hyphen encode a delivery segment inside 55042. 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 55042 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 55042.
| ZIP | City | Distance |
|---|---|---|
| 55128 | Saint Paul, MN | 3.2 mi |
| 55090 | Willernie, MN | 5.1 mi |
| 55125 | Saint Paul, MN | 5.5 mi |
| 55115 | Saint Paul, MN | 5.7 mi |
| 55003 | Bayport, MN | 6 mi |
| 55082 | Stillwater, MN | 6.3 mi |
| 55119 | Saint Paul, MN | 6.4 mi |
| 55109 | Saint Paul, MN | 6.4 mi |
| 55129 | Saint Paul, MN | 6.8 mi |
| 55043 | Lakeland, MN | 7.2 mi |
| 55001 | Afton, MN | 7.4 mi |
| 55106 | Saint Paul, MN | 7.7 mi |
Questions about 55042
What is the ZIP+4 code for 55042?
55042 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 55042, you need to look up a specific street address to get them.
What city is 55042?
55042 is assigned to Lake Elmo, Minnesota, in Washington 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.