ZIP codes in Ashtabula County
22 ZIPs touch Ashtabula County, Ohio. The blue dashed line is the county border; orange ZIPs reach into it.
22
ZIP codes
8
cross the county line
140,309
people in these ZIPs
88
counties in OH
Most people
Ashtabula County ZIP list
More counties in Ohio
- Adams County13
- Allen County21
- Ashland County20
- Athens County21
- Auglaize County18
- Belmont County33
- Brown County20
- Butler County23
- Carroll County21
Questions people actually ask
How many ZIP codes are in Ashtabula County, Ohio?
22 ZIP codes reach into Ashtabula 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 Ashtabula County has the most people?
44004 (Ashtabula) has about 31,114 residents, the most of any ZIP touching Ashtabula County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Ashtabula 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 Ashtabula 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