ZIP Code 45840 — Findlay, OH
45840 is a standard (street delivery) ZIP code serving Findlay, Ohio, in Hancock 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 45840 at a glance
| ZIP code | 45840 |
|---|---|
| Primary city | Findlay |
| State | Ohio (OH) |
| County | Hancock FIPS 39063 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 54,559 |
| Coordinates | 41.026260, -83.649430 |
How ZIP+4 works in 45840
The four digits after the hyphen encode a delivery segment inside 45840. 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 45840 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 45840.
| ZIP | City | Distance |
|---|---|---|
| 45816 | Benton Ridge, OH | 7.7 mi |
| 44804 | Arcadia, OH | 8.1 mi |
| 45889 | Van Buren, OH | 8.3 mi |
| 45881 | Rawson, OH | 8.4 mi |
| 45814 | Arlington, OH | 8.8 mi |
| 45890 | Vanlue, OH | 8.9 mi |
| 45858 | Mccomb, OH | 9.8 mi |
| 45867 | Mount Blanchard, OH | 10.6 mi |
| 45868 | Mount Cory, OH | 11.1 mi |
| 45841 | Jenera, OH | 11.1 mi |
| 45872 | North Baltimore, OH | 11.3 mi |
| 44802 | Alvada, OH | 12.1 mi |
Questions about 45840
What is the ZIP+4 code for 45840?
45840 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 45840, you need to look up a specific street address to get them.
What city is 45840?
45840 is assigned to Findlay, Ohio, in Hancock 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.