| ZIP Codes: | 16 ZIP Codes (9 Standard, 7 PO Box, 0 Unique) [See All] |
| Area Codes: | 419 / 567 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:21 PM |
| Population: | 42,024 [See All] |
| FIPS: | 39123 |
| CBSA: | Sandusky, OH |
| Land Area: | 288 sq mi |
| Water Area: | 38 sq mi |
| Coordinates: | 41.5694, -83.1107 |
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42,024 residents live across 16 ZIPs covering 288 sq mi, served by 16 distinct USPS-recognized cities.
Population moved from 43,734 to 42,024 from 2014 to 2024 — a -3.9% change. 5 ZIPs gained residents, 10 lost.
The county's wealthiest ZIP 43432 (Graytown, $152,411 median) and poorest ZIP 43408 (Clay Center, $61,719) are 5.8 miles apart — a 2.5× income gap across local geography.
Median home values vary 6.1× across this county — from $97,100 in 43458 (Rocky Ridge) to $589,000 in 43456 (Put In Bay).
Density varies 15× across the county — from 40 people/sq mi in 43445 (Martin) to 620 in 43468 (Williston).
Educational attainment ranges from 5.4% bachelor's+ in 43408 (Clay Center) to 40.7% in 43440 (Lakeside Marblehead) — the breadth of educational profiles across the area.
Within Ohio, this is the #59 most populous of 88 counties and ranks #10 for median household income .
Weighted by population, the typical household earns about $78,910 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.7% of adults age 25+ hold a bachelor's degree or higher (9,155 of 31,852 reporting).
9 Standard delivery, 7 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 43452 | Port Clinton | Standard | 14,264 | $67,490 | 50.8 | 4.3% |
| 43449 | Oak Harbor | Standard | 7,572 | $71,083 | 88.3 | -9.0% |
| 43430 | Genoa | Standard | 4,911 | $73,807 | 27.0 | -3.1% |
| 43440 | Lakeside Marblehead | Standard | 4,222 | $74,818 | 16.0 | -14.9% |
| 43412 | Curtice | Standard | 4,175 | $107,885 | 29.3 | -7.1% |
| 43416 | Elmore | Standard | 2,868 | $88,611 | 27.2 | 0.6% |
| 43432 | Graytown | Standard | 1,357 | $152,411 | 22.1 | -7.2% |
| 43445 | Martin | Standard | 801 | $82,670 | 19.8 | -27.8% |
| 43456 | Put In Bay | PO Box | 692 | $72,969 | 2.4 | 25.1% |
| 43468 | Williston | PO Box | 459 | $130,533 | 0.7 | 29.7% |
| 43408 | Clay Center | PO Box | 386 | $61,719 | 0.7 | 32.6% |
| 43458 | Rocky Ridge | PO Box | 282 | $78,906 | 0.5 | -28.6% |
| 43446 | Middle Bass | PO Box | 35 | — | 1.3 | -77.0% |
| 43436 | Isle Saint George | Standard | 0 | — | 1.1 | — |
| 43433 | Gypsum | PO Box | 0 | — | 0.5 | -100.0% |
| 43439 | Lacarne | PO Box | 0 | — | 0.3 | -100.0% |