ZIP Code 43420 — Fremont, OH
43420 is a standard (street delivery) ZIP code serving Fremont, Ohio, in Sandusky 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 43420 at a glance
| ZIP code | 43420 |
|---|---|
| Primary city | Fremont |
| State | Ohio (OH) |
| County | Sandusky FIPS 39143 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 29,520 |
| Coordinates | 41.357490, -83.112650 |
How ZIP+4 works in 43420
The four digits after the hyphen encode a delivery segment inside 43420. 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 43420 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 43420.
| ZIP | City | Distance |
|---|---|---|
| 43442 | Lindsey, OH | 7.2 mi |
| 44861 | Old Fort, OH | 8.1 mi |
| 43410 | Clyde, OH | 8.7 mi |
| 44836 | Green Springs, OH | 8.8 mi |
| 43407 | Burgoon, OH | 9 mi |
| 43464 | Vickery, OH | 9.9 mi |
| 44815 | Bettsville, OH | 10.1 mi |
| 43435 | Helena, OH | 10.5 mi |
| 43439 | Lacarne, OH | 11.6 mi |
| 43416 | Elmore, OH | 12 mi |
| 43431 | Gibsonburg, OH | 12 mi |
| 43449 | Oak Harbor, OH | 12.4 mi |
Questions about 43420
What is the ZIP+4 code for 43420?
43420 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 43420, you need to look up a specific street address to get them.
What city is 43420?
43420 is assigned to Fremont, Ohio, in Sandusky 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.