Washington County, Ohio Zip Codes by Population (2024)

The most populated Zip Code in Washington County, Ohio is 45750, located in Marietta. * 2024 populations estimated based on the latest ACS 5-year data.

Zip Code
City
Population
45750Marietta26,250
45714Belpre9,167
45742Little Hocking3,335
45784Vincent3,250
45786Waterford2,854
45767New Matamoras2,598
45744Lowell2,234
45724Cutler2,190
45729Fleming2,111
45768Newport1,567
45788Whipple975
45773Reno533
45746Macksburg373
45789Wingett Run146
45721Coal Run23