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ZIP codes in Trumbull County

34 ZIPs touch Trumbull County, Ohio. The blue dashed line is the county border; orange ZIPs reach into it.

34

ZIP codes

13

cross the county line

251,454

people in these ZIPs

88

counties in OH

Most people

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Trumbull County ZIP list

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Questions people actually ask

How many ZIP codes are in Trumbull County, Ohio?

34 ZIP codes reach into Trumbull County, including 3 PO Box or single-address ZIPs placed by the town they serve. 13 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Trumbull County has the most people?

44483 (Warren) has about 25,805 residents, the most of any ZIP touching Trumbull County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Trumbull 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 Trumbull 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