Seneca County, Ohio ZIP codes
15 ZIP codes are in Seneca County, plus 6 that cross in from neighboring counties. It's part of the Tiffin, OH micro area.
- ZIP codes
- 15
- Population in these ZIPs
- 60,208
- Avg. median income
- $66,000population-weighted
- Cities & towns
- 15
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Seneca County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 44802 | Alvada | 746 | $80,000 | $293,400 |
| 44807 | Attica | 2,244 | $87,356 | $182,800 |
| 44809 | Bascom | 103 | — | $140,600 |
| 44815 | Bettsville | 710 | $74,688 | $133,400 |
| 44818 | Bloomville | 1,989 | $63,922 | $192,900 |
| 44828 | Flat Rock | 138 | — | — |
| 44830 | Fostoria | 18,671 | $62,990 | $143,700 |
| 44836 | Green Springs | 2,496 | $79,299 | $177,400 |
| 44841 | Kansas | 498 | $53,295 | $189,600 |
| 44844 | Mc Cutchenville | 744 | $83,556 | $196,900 |
| 44845 PO Box | Melmore | — | — | — |
| 44853 | New Riegel | 1,391 | $90,281 | $255,700 |
| 44861 | Old Fort | 31 | — | — |
| 44867 | Republic | 2,345 | $72,716 | $226,800 |
| 44883 | Tiffin | 28,102 | $62,692 | $193,700 |
ZIP codes partly in Seneca County
These ZIP codes are mostly in a neighboring county but cover part of Seneca County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 43316 | Carey | Wyandot County | 5,968 | $78,828 | $185,400 |
| 43410 | Clyde | Sandusky County | 10,220 | $52,500 | $193,900 |
| 43457 | Risingsun | Wood County | 1,411 | $54,583 | $158,700 |
| 44811 | Bellevue | Huron County | 12,690 | $70,060 | $188,100 |
| 44854 | New Washington | Crawford County | 1,630 | $70,357 | $185,000 |
| 44882 | Sycamore | Wyandot County | 2,133 | $73,529 | $186,200 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Seneca County
Nearby counties
Frequently asked questions
How many ZIP codes are in Seneca County, Ohio?
15 ZIP codes are mainly in Seneca County, and 6 more ZIP codes from neighboring areas reach partly into it.
What cities are in Seneca County?
ZIP codes in Seneca County use the city names Alvada, Attica, Bascom, Bettsville, Bloomville, Flat Rock, Fostoria, Green Springs, Kansas, Mc Cutchenville, Melmore and New Riegel and others.
What metro area is Seneca County in?
Seneca County is part of the Tiffin, OH micropolitan statistical area.