Hardin County, Ohio ZIP codes
10 ZIP codes are in Hardin County, plus 6 that cross in from neighboring counties.
- ZIP codes
- 10
- Population in these ZIPs
- 34,157
- Avg. median income
- $64,100population-weighted
- Cities & towns
- 10
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ZIP codes in Hardin County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 43310 | Belle Center | 3,177 | $68,388 | $286,000 |
| 43326 | Kenton | 12,573 | $63,785 | $181,900 |
| 43340 | Mount Victory | 2,103 | $72,446 | $227,100 |
| 43346 | Roundhead | 238 | $57,130 | — |
| 45810 | Ada | 7,449 | $63,451 | $232,000 |
| 45812 | Alger | 2,027 | $44,045 | $163,400 |
| 45835 | Dola | 449 | $76,042 | $196,200 |
| 45836 | Dunkirk | 1,573 | $56,250 | $169,000 |
| 45843 | Forest | 4,184 | $71,541 | $194,900 |
| 45859 | Mc Guffey | 384 | $51,250 | $91,500 |
ZIP codes partly in Hardin County
These ZIP codes are mostly in a neighboring county but cover part of Hardin County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 43331 | Lakeview | Logan County | 4,106 | $60,980 | $199,900 |
| 43332 | La Rue | Marion County | 2,173 | $81,382 | $215,500 |
| 43345 | Ridgeway | Logan County | 666 | $90,821 | $251,900 |
| 43347 | Rushsylvania | Logan County | 1,113 | $93,893 | $268,600 |
| 45850 | Harrod | Allen County | 3,559 | $84,886 | $241,400 |
| 45896 | Waynesfield | Auglaize County | 1,833 | $62,449 | $212,000 |
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 Hardin County
Nearby counties
Frequently asked questions
How many ZIP codes are in Hardin County, Ohio?
10 ZIP codes are mainly in Hardin County, and 6 more ZIP codes from neighboring areas reach partly into it.
What cities are in Hardin County?
ZIP codes in Hardin County use the city names Ada, Alger, Belle Center, Dola, Dunkirk, Forest, Kenton, Mc Guffey, Mount Victory and Roundhead.