There are 17 zip codes in Washington County, Ohio. The most populated is 45750, located in Marietta. * 2024 populations estimated based on the latest ACS 5-year data.

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Zip Code
Population
City
4575026,250Marietta
457149,167Belpre
457423,335Little Hocking
457843,250Vincent
457862,854Waterford
457672,598New Matamoras
457442,234Lowell
457152,197Beverly
457242,190Cutler
457292,111Fleming
457681,567Newport
457451,049Lower Salem
45788975Whipple
45773533Reno
45746373Macksburg
45789146Wingett Run
4572123Coal Run
showing: 17 rows

Zip Codes in Washington County, Ohio by Population (2024)