Cairo, OH ZIP code
The ZIP code for Cairo, Ohio is 45820. It is in Allen County.
- Population in these ZIPs
- 581
- Avg. median income
- $83,100population-weighted
- Typical home value
- $142,700population-weighted
- Metro area
- Lima, OH
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Cairo, OH ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 45820 | 581 | $83,125 | $142,700 |
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 near Cairo
- Vaughnsville 5 mi
- Gomer 5 mi
- Columbus Grove 5 mi
- Beaverdam 6 mi
- Lima 6 mi
- Lafayette 8 mi
- Bluffton 11 mi
- Pandora 12 mi
- Fort Jennings 12 mi
- Kalida 12 mi
- Harrod 12 mi
- Ottawa 13 mi
Frequently asked questions
What is the ZIP code for Cairo, OH?
The ZIP code for Cairo, OH is 45820.
What county is Cairo, Ohio in?
Cairo ZIP codes are in Allen County.