ZIP Code 52340 — Tiffin, IA
52340 is a standard (street delivery) ZIP code serving Tiffin, Iowa, in Johnson 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 52340 at a glance
| ZIP code | 52340 |
|---|---|
| Primary city | Tiffin |
| State | Iowa (IA) |
| County | Johnson FIPS 19103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 6,128 |
| Coordinates | 41.706150, -91.680190 |
How ZIP+4 works in 52340
The four digits after the hyphen encode a delivery segment inside 52340. 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 52340 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 52340.
| ZIP | City | Distance |
|---|---|---|
| 52241 | Coralville, IA | 4.3 mi |
| 52322 | Oxford, IA | 4.4 mi |
| 52317 | North Liberty, IA | 4.6 mi |
| 52246 | Iowa City, IA | 5.8 mi |
| 52242 | Iowa City, IA | 7.7 mi |
| 52338 | Swisher, IA | 8.6 mi |
| 52245 | Iowa City, IA | 9.3 mi |
| 52236 | Homestead, IA | 10.3 mi |
| 52240 | Iowa City, IA | 10.7 mi |
| 52333 | Solon, IA | 12 mi |
| 52235 | Hills, IA | 12.1 mi |
| 52307 | Middle Amana, IA | 12.9 mi |
Questions about 52340
What is the ZIP+4 code for 52340?
52340 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 52340, you need to look up a specific street address to get them.
What city is 52340?
52340 is assigned to Tiffin, Iowa, in Johnson 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.