ZIP Code 52140 — Dorchester, IA
52140 is a standard (street delivery) ZIP code serving Dorchester, Iowa, in Allamakee 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 52140 at a glance
| ZIP code | 52140 |
|---|---|
| Primary city | Dorchester |
| State | Iowa (IA) |
| County | Allamakee FIPS 19005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 671 |
| Coordinates | 43.441730, -91.531080 |
How ZIP+4 works in 52140
The four digits after the hyphen encode a delivery segment inside 52140. 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 52140 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 52140.
| ZIP | City | Distance |
|---|---|---|
| 55931 | Eitzen, MN | 8.4 mi |
| 52160 | New Albin, IA | 9.1 mi |
| 55974 | Spring Grove, MN | 11.1 mi |
| 52172 | Waukon, IA | 12 mi |
| 55921 | Caledonia, MN | 12.9 mi |
| 52101 | Decorah, IA | 13.1 mi |
| 52151 | Lansing, IA | 14.2 mi |
| 55954 | Mabel, MN | 15.3 mi |
| 55919 | Brownsville, MN | 16.8 mi |
| 52170 | Waterville, IA | 18.6 mi |
| 54624 | De Soto, WI | 19.6 mi |
| 55922 | Canton, MN | 20.1 mi |
Questions about 52140
What is the ZIP+4 code for 52140?
52140 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 52140, you need to look up a specific street address to get them.
What city is 52140?
52140 is assigned to Dorchester, Iowa, in Allamakee 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.