ZIP code 45820
Where is ZIP code 45820?
Cairo, Ohio
Allen County · PO Box only ZIP code
ZIP code 45820 belongs to Cairo, Ohio in Allen County. 45820 is a PO Box only ZIP code: it is used for post office boxes at the Cairo post office, not for street addresses. It is in the Eastern Time zone and uses area codes 419 and 567. About 581 people live in the 45820 area, where the median household income is $83,125. The closest ZIP codes are 45807 (Lima, 3.7 mi southwest), 45802 (Lima, 4.4 mi southwest) and 45801 (Lima, 4.6 mi south).
| ZIP code | 45820 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Cairo |
| State | Ohio (OH) |
| County | Allen County |
| Time zone | Eastern Time · now |
| Area codes | 419, 567 |
| Coordinates | 40.8304, -84.0852 map |
| 3-digit prefix | 458 |
Population and income in 45820
| Population | 581 · lower than 82% of Ohio ZIP codes |
|---|---|
| People per square mile | 2,097 · higher than 85% of Ohio ZIP codes |
| Median age | 35.9 years · lower than 81% of Ohio ZIP codes |
| Men / women | 56% / 44% |
| Median household income | $83,125 · higher than 73% of Ohio ZIP codes |
| Income per person | $33,722 |
| Below the poverty line | 6.9% |
| Bachelor’s degree or higher | 20% of adults 25+ |
| Median home value | $114,500 · lower than 86% of Ohio ZIP codes |
| Median rent | $1,023 a month |
| Housing units | 239 |
| Households | 214 (2.71 people on average) |
| Owners / renters | 86% / 14% |
| Land area | 0.28 sq mi |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 45820. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 45820
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 45807 | Lima, OH | 3.7 mi SW | Standard |
| 45802 | Lima, OH | 4.4 mi SW | PO Box only |
| 45801 | Lima, OH | 4.6 mi S | Standard |
| 45893 | Vaughnsville, OH | 4.9 mi NW | PO Box only |
| 45809 | Gomer, OH | 5.4 mi W | Standard |
| 45808 | Beaverdam, OH | 5.7 mi E | Standard |
| 45830 | Columbus Grove, OH | 5.8 mi N | Standard |
| 45805 | Lima, OH | 7 mi SW | Standard |
| 45804 | Lima, OH | 7.1 mi S | Standard |
| 45854 | Lafayette, OH | 8.7 mi SE | PO Box only |
| 45817 | Bluffton, OH | 10.7 mi E | Standard |
| 45850 | Harrod, OH | 10.7 mi SE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 45820 or measure the distance to another ZIP code.
How to address mail to 45820
PO BOX 123
CAIRO OH 45820
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (45820-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 45820?
- 45820 is a Cairo, Ohio ZIP code.
- What county is 45820 in?
- ZIP code 45820 is in Allen County, Ohio.
- What time zone is ZIP code 45820 in?
- 45820 is in the Eastern Time zone (America/New_York).
- What area code is 45820?
- Phone numbers in ZIP code 45820 use area codes 419 and 567.
- What is the population of ZIP code 45820?
- About 581 people live in ZIP code 45820, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 45820?
- The median household income in 45820 is $83,125 a year, higher than 73% of Ohio ZIP codes.
- Can I use 45820 for a street address?
- No. 45820 is only for PO Boxes. Street addresses in Cairo use another ZIP code.
- What ZIP codes are near 45820?
- The nearest ZIP codes to 45820 are 45807 (Lima, 3.7 miles), 45802 (Lima, 4.4 miles), 45801 (Lima, 4.6 miles) and 45893 (Vaughnsville, 4.9 miles).