ZIP Code 45688 — Waterloo, OH
45688 is a standard (street delivery) ZIP code serving Waterloo, Ohio, in Lawrence 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 45688 at a glance
| ZIP code | 45688 |
|---|---|
| Primary city | Waterloo |
| State | Ohio (OH) |
| County | Lawrence FIPS 39087 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 210 |
| Coordinates | 38.730130, -82.531550 |
How ZIP+4 works in 45688
The four digits after the hyphen encode a delivery segment inside 45688. 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 45688 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 45688.
| ZIP | City | Distance |
|---|---|---|
| 45659 | Pedro, OH | 6.4 mi |
| 45658 | Patriot, OH | 6.7 mi |
| 45696 | Willow Wood, OH | 9.7 mi |
| 45682 | South Webster, OH | 10.4 mi |
| 45656 | Oak Hill, OH | 10.5 mi |
| 45645 | Kitts Hill, OH | 11 mi |
| 45678 | Scottown, OH | 11.9 mi |
| 45677 | Scioto Furnace, OH | 12.9 mi |
| 45674 | Rio Grande, OH | 13.1 mi |
| 45694 | Wheelersburg, OH | 13.6 mi |
| 45638 | Ironton, OH | 14 mi |
| 45685 | Thurman, OH | 14.6 mi |
Questions about 45688
What is the ZIP+4 code for 45688?
45688 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 45688, you need to look up a specific street address to get them.
What city is 45688?
45688 is assigned to Waterloo, Ohio, in Lawrence 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.