Hardin County, OH: Cities, ZIP Codes & Population
Hardin County in Ohio (FIPS 39065) contains 10 communities in our dataset. The largest is Kenton, OH, and the listed places add up to roughly 18,634 residents. Below you can browse its cities, check its ZIP codes and find nearby counties.
What are the key facts about Hardin County?
| County | Hardin County |
|---|---|
| State | Ohio |
| FIPS code | 39065 |
| Places in our data | 10 |
| Places with a city page | 2 |
| Combined place estimates | 18,634 |
| Largest place | Kenton, OH (8,276) |
| Rank in state | 64th of 88 counties by combined place population |
| Weighted density | 1,851 per sq mi |
| Time zone | Eastern time |
| ZIP codes | 9 |
Which cities and towns are in Hardin County?
Hardin County has 2 places large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Kenton, OH is the largest, followed by Ada, OH.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Kenton, OH | Incorporated | 8,276 | 1,642 | 1 |
| Ada, OH | Incorporated | 5,544 | 2,624 | 1 |
The county also contains 8 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: Forest, Dunkirk, Alger, Mount Victory, McGuffey, Ridgeway, Dola, Patterson. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Hardin County compared with other counties in Ohio?
Adding up the estimates for the places in our data gives 18,634 people, which ranks Hardin County 64th among 88 counties in Ohio. The average listed place has about 1,863 residents. The weighted density is about 1,851 people per square mile, which is suburban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Hardin County?
The places in Hardin County use 9 ZIP codes: 43326, 43340, 43345, 45810, 45812, 45835, 45836, 45843, 45859. Every code begins with 4, which is assigned to the Great Lakes and Ohio Valley (Indiana, Kentucky, Michigan and Ohio). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Hardin County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Wyandot County, OH — about 20 miles northeast (center to center), 12,284 people in listed places
- Hancock County, OH — about 20 miles north (center to center), 54,738 people in listed places
- Logan County, OH — about 22 miles south (center to center), 28,826 people in listed places
- Allen County, OH — about 23 miles west (center to center), 92,494 people in listed places
- Marion County, OH — about 26 miles east (center to center), 49,082 people in listed places
- Auglaize County, OH — about 30 miles west (center to center), 34,368 people in listed places
What does the FIPS code 39065 mean?
The first two digits, 39, identify Ohio, and the last three, 065, identify Hardin County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the Ohio hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.