ZIP Code 52327 — Riverside, IA
52327 is a standard (street delivery) ZIP code serving Riverside, Iowa, 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 52327 at a glance
| ZIP code | 52327 |
|---|---|
| Primary city | Riverside |
| State | Iowa (IA) |
| County | Washington FIPS 19183 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,796 |
| Coordinates | 41.477000, -91.580460 |
How ZIP+4 works in 52327
The four digits after the hyphen encode a delivery segment inside 52327. 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 52327 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 52327.
| ZIP | City | Distance |
|---|---|---|
| 52235 | Hills, IA | 6.9 mi |
| 52247 | Kalona, IA | 7.6 mi |
| 52755 | Lone Tree, IA | 7.6 mi |
| 52201 | Ainsworth, IA | 10.1 mi |
| 52240 | Iowa City, IA | 11.5 mi |
| 52246 | Iowa City, IA | 11.9 mi |
| 52242 | Iowa City, IA | 12.9 mi |
| 52739 | Conesville, IA | 13.1 mi |
| 52356 | Wellman, IA | 13.8 mi |
| 52245 | Iowa City, IA | 13.9 mi |
| 52353 | Washington, IA | 14.1 mi |
| 52766 | Nichols, IA | 14.5 mi |
Questions about 52327
What is the ZIP+4 code for 52327?
52327 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 52327, you need to look up a specific street address to get them.
What city is 52327?
52327 is assigned to Riverside, Iowa, 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.