ZIP codes in Carter County
18 ZIPs touch Carter County, Oklahoma. The blue dashed line is the county border; orange ZIPs reach into it.
18
ZIP codes
8
cross the county line
60,221
people in these ZIPs
77
counties in OK
Most people
Carter County ZIP list
More counties in Oklahoma
- Beaver County7
- Beckham County8
- Blaine County14
- Bryan County16
- Caddo County17
- Canadian County15
- Cherokee County18
- Choctaw County12
- Cimarron County5
- Cleveland County23
- Coal County10
- Comanche County22
Questions people actually ask
How many ZIP codes are in Carter County, Oklahoma?
18 ZIP codes reach into Carter County, including 2 PO Box or single-address ZIPs placed by the town they serve. 8 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Carter County has the most people?
73401 (Ardmore) has about 36,833 residents, the most of any ZIP touching Carter County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Carter 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 Carter 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