| | Washington County | OH | 39167 | | Marietta, OH 31930 | Parkersburg-Marietta-Vienna,
WV-OH 425 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=WashingtonCounty+OH |
| | Wirt County | WV | 54105 | | Parkersburg-Vienna, WV 37620 | Parkersburg-Marietta-Vienna,
WV-OH 425 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=WirtCounty+WV |
| | Wood County | WV | 54107 | | Parkersburg-Vienna, WV 37620 | Parkersburg-Marietta-Vienna,
WV-OH 425 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=WoodCounty+WV |