ZIP code · Cairo · Ohio · United States
ZIP code 45820 — Cairo
ZIP code 45820 serves Cairo, Ohio.
- Postal code
- 45820Single source Value from one source, not cross-checked.
- City
- Cairo
- County
- Allen FIPS 39003
- State
- Ohio
- Country
- United States
- Coordinates
- 40.8304, -84.0852 — precision precise (locality)
View on OpenStreetMap - Population
- 600 (ZCTA, ACS 5-year)
- Population density
- 2,158 / sq mi
- Land area
- 0.3 sq mi (0.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $79,643
- Per-capita income
- $33,606
- Median age
- 34.9
- Households
- 236
- Housing units
- 263
- Median home value
- $107,900
- Median gross rent
- $850 / month
- Congressional district
- OH-4 (119th Congress)
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 45820 with another ZIP · ZIPs within 25 miles · distance from 45820
Map of ZIP code 45820
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 19°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 34 | 37 | 48 | 61 | 72 | 80 | 84 | 82 | 77 | 64 | 50 | 39 |
| Avg low °F | 19 | 21 | 29 | 39 | 50 | 60 | 63 | 62 | 55 | 44 | 33 | 25 |
| Precip in | 2.8 | 2.5 | 3.0 | 4.0 | 4.4 | 4.3 | 4.4 | 3.8 | 3.2 | 2.9 | 3.1 | 2.7 |
NOAA 1991–2020 climate normals from the nearest station: LIMA WWTP (7.6 mi) · NOAA NCEI
Places in ZIP 45820
- 1 parks
- 1 playgrounds
- 1 libraries
- 1 post offices
- 2 places of worship
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI. Data generated on 2026-08-21. Methodology · Report an error on this page