ZIP codes in Klamath County
19 ZIPs touch Klamath County, Oregon. The blue dashed line is the county border; orange ZIPs reach into it.
19
ZIP codes
2
cross the county line
81,516
people in these ZIPs
36
counties in OR
Most people
Klamath County ZIP list
More counties in Oregon
- Grant County12
- Harney County10
- Hood River County4
- Jackson County18
- Jefferson County8
- Josephine County13
- Lake County10
- Lane County42
- Lincoln County18
- Linn County22
- Malheur County14
- Marion County35
Questions people actually ask
How many ZIP codes are in Klamath County, Oregon?
19 ZIP codes reach into Klamath County, including 1 PO Box or single-address ZIPs placed by the town they serve. 2 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Klamath County has the most people?
97603 (Klamath Falls) has about 33,222 residents, the most of any ZIP touching Klamath County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Klamath 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 Klamath 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.
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Updated 2026-11-10 · Where the data comes from