State Route 555 is a 62.39 miles (100.4 km) long, north–south running state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 that passes through four counties in southeastern Ohio

Ohio

Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...

. State Route 555's southern terminus is at the triplex of U.S. Route 50, State Route 7 and State Route 32 in the unincorporated community of Little Hocking

Little Hocking, Ohio

Little Hocking is a census-designated place in southern Belpre Township, Washington County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code of 45742....

 in extreme southwestern Washington County

Washington County, Ohio

Washington County is a county located in the state of Ohio. As of the 2010 census, the population was 61,778. Its county seat is Marietta. The county, the oldest in the state, is named for George Washington. Washington County is included in the Parkersburg-Marietta-Vienna, West Virginia-Ohio...

. Its northern terminus is at State Route 60

Ohio State Route 60

State Route 60 is a north–south state highway that runs the entire length of the U.S. state of Ohio, from State Route 7 along the Ohio River in Marietta to U.S. Route 6 near Lake Erie in Vermilion....

 in South Zanesville

South Zanesville, Ohio

South Zanesville is a village in Muskingum County, Ohio, United States, along the Muskingum River at the mouth of Moxahala Creek. The population was 1,936 at the 2000 census.-Geography:...

. The route passes through primarily rural portions of Washington

Washington County, Ohio

Washington County is a county located in the state of Ohio. As of the 2010 census, the population was 61,778. Its county seat is Marietta. The county, the oldest in the state, is named for George Washington. Washington County is included in the Parkersburg-Marietta-Vienna, West Virginia-Ohio...

, Morgan

Morgan County, Ohio

**----...

, Perry

Perry County, Ohio

Perry County is a county located in the state of Ohio, United States. Founded on March 1, 1818, it was the 55th county to be formed in Ohio. Portions of Fairfield, Washington and Muskingum Counties were taken to create Perry County. As of the 2010 census, the population was 36,058. Its county seat...

, and Muskingum

Muskingum County, Ohio

Muskingum County is a county located in the state of Ohio, United States. As of the 2010 census, the population was 86,074. Its county seat is Zanesville...

 counties, connecting unincorporated villages along the way. Its emergence into South Zanesville at the northern end takes the route into a more suburban setting before it terminates.

Major intersections

History

• 1938 – Original route established; no significant changes in alignment have been made to the route.