Ohio ZIP codes
All 1,416 ZIPs in Ohio, 43001 to 45999. Tap one on the map or in the list.
1,416
ZIP codes
11,810,293
people live in them
88
counties
183
PO Box & no-area ZIPs
Most people
All 1,416 Ohio ZIP codes
ZIP codes by county
Pick a county for its ZIP list and map. Counts include ZIPs that only partly reach into the county.
- Adams County13
- Allen County21
- Ashland County20
- Ashtabula County22
- Athens County21
- Auglaize County18
- Belmont County33
- Brown County20
- Butler County23
- Carroll County21
- Champaign County19
- Clark County23
- Clermont County23
- Clinton County14
- Columbiana County30
- Coshocton County19
- Crawford County15
- Cuyahoga County63
- Darke County25
- Defiance County16
- Delaware County25
- Erie County15
- Fairfield County19
- Fayette County11
- Franklin County68
- Fulton County12
- Gallia County13
- Geauga County22
- Greene County25
- Guernsey County20
- Hamilton County84
- Hancock County25
- Hardin County16
- Harrison County19
- Henry County19
- Highland County15
- Hocking County16
- Holmes County20
- Huron County15
- Jackson County11
- Jefferson County25
- Knox County17
- Lake County14
- Lawrence County15
- Licking County32
- Logan County19
- Lorain County25
- Lucas County48
- Madison County12
- Mahoning County41
- Marion County16
- Medina County26
- Meigs County17
- Mercer County18
- Miami County19
- Monroe County17
- Montgomery County56
- Morgan County11
- Morrow County18
- Muskingum County24
- Noble County15
- Ottawa County20
- Paulding County15
- Perry County17
- Pickaway County18
- Pike County13
- Portage County27
- Preble County16
- Putnam County21
- Richland County21
- Ross County17
- Sandusky County17
- Scioto County24
- Seneca County20
- Shelby County19
- Stark County51
- Summit County56
- Trumbull County34
- Tuscarawas County28
- Union County22
- Van Wert County14
- Vinton County15
- Warren County24
- Washington County24
- Wayne County26
- Williams County12
- Wood County35
- Wyandot County15
Questions people actually ask
How many ZIP codes are in Ohio?
1,416 ZIP codes are in use in Ohio. 1,233 cover a delivery area, and 183 are PO Box, single-building or organization ZIPs with no area of their own.
What do Ohio ZIP codes start with?
Ohio ZIP codes start with these three-digit prefixes: 430–459. Each prefix is a mail sorting area run from one processing center.
Which Ohio ZIP code has the most people?
45011 in Hamilton has the most residents of any Ohio ZIP, about 75,864 people in the Census Bureau’s ACS 2020–2024 estimates.
Which Ohio county has the most ZIP codes?
Hamilton County touches 84 ZIP codes, the most of the 88 counties in Ohio. 464 Ohio ZIPs reach into more than one county.
Are these the official USPS ZIP code boundaries?
The map uses Census ZIP Code Tabulation Areas, the standard public stand-in for USPS delivery areas. They match for almost every home. For a mailing address, the USPS ZIP Code lookup has the final word.
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Updated 2026-11-10 · Where the data comes from