ZIP Code 45820: Cairo, OH
County: Allen
Coordinates: 40.83040, -84.08520
ZIP Type: Standard
Time Zone: Eastern Time (ET)
Explore detailed information for ZIP code 45820 in Cairo, OH. We include verified county details for Allen plus key geographic references used for mapping and logistics.
| Primary City | Cairo |
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| ZIP Code | 45820 |
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| County | Allen |
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| State | OH |
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| Latitude / Longitude | 40.83040, -84.08520 |
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| ZIP Type | Standard |
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| Time Zone | Eastern Time (ET) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 45820 (not an exact boundary).
Geographic & Administrative Context
Coordinates for 45820 are listed as 40.83040 / -84.08520, useful for GPS and service checks in and around Cairo, OH.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 45820 for mail delivery and general location reference in
Allen,
OH.
Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Cairo.
Related ZIP Codes (Nearby)
Explore other postal codes near Cairo within OH.
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Frequently Asked Questions
What is the primary city for ZIP code 45820?
The primary city for this ZIP code is Cairo, located in OH.
In which county is 45820 located?
ZIP code 45820 is situated within Allen, OH.
What are the coordinates for 45820?
The approximate center point is 40.83040 (Latitude) and -84.08520 (Longitude).
Is ZIP code 45820 active?
This page lists ZIP 45820 as Listed based on the latest refresh date shown above.
Does ZIP 45820 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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Methodology & Data Notes
How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.
Page updated: 2026-01-08