ZIP codes in Imperial County
20 ZIPs touch Imperial County, California. The blue dashed line is the county border; orange ZIPs reach into it.
20
ZIP codes
3
cross the county line
215,508
people in these ZIPs
58
counties in CA
Most people
Imperial County ZIP list
More counties in California
- Contra Costa County59
- Del Norte County6
- El Dorado County32
- Fresno County101
- Glenn County8
- Humboldt County39
- Inyo County11
- Kern County69
- Kings County14
- Lake County16
- Lassen County19
- Los Angeles County519
Questions people actually ask
How many ZIP codes are in Imperial County, California?
20 ZIP codes reach into Imperial County, including 2 PO Box or single-address ZIPs placed by the town they serve. 3 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Imperial County has the most people?
92243 (El Centro) has about 49,069 residents, the most of any ZIP touching Imperial County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Imperial County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Imperial County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
Keep exploring
Updated 2026-11-10 · Where the data comes from