ZIP Code 43440 — Lakeside Marblehead, OH
43440 is a standard (street delivery) ZIP code serving Lakeside Marblehead, Ohio, in Ottawa 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 43440 at a glance
| ZIP code | 43440 |
|---|---|
| Primary city | Lakeside Marblehead |
| State | Ohio (OH) |
| County | Ottawa FIPS 39123 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,222 |
| Coordinates | 41.526620, -82.781450 |
How ZIP+4 works in 43440
The four digits after the hyphen encode a delivery segment inside 43440. 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 43440 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 43440.
| ZIP | City | Distance |
|---|---|---|
| 43433 | Gypsum, OH | 5.3 mi |
| 43438 | Kelleys Island, OH | 6.7 mi |
| 43456 | Put In Bay, OH | 8.8 mi |
| 44870 | Sandusky, OH | 8.9 mi |
| 43452 | Port Clinton, OH | 9.5 mi |
| 44824 | Castalia, OH | 10.2 mi |
| 43446 | Middle Bass, OH | 11 mi |
| 43464 | Vickery, OH | 11.5 mi |
| 43436 | Isle Saint George, OH | 13.2 mi |
| 43439 | Lacarne, OH | 13.5 mi |
| 44839 | Huron, OH | 15.7 mi |
| 44846 | Milan, OH | 17.1 mi |
Questions about 43440
What is the ZIP+4 code for 43440?
43440 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 43440, you need to look up a specific street address to get them.
What city is 43440?
43440 is assigned to Lakeside Marblehead, Ohio, in Ottawa 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.