State Route 180 is a 29.55 miles (47.6 km) long east–west 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...

 in the southern portion of the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of 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...

. SR 180 has its western terminus at a T-intersection with SR 159 nearly 5 miles (8 km) northeast of Chillicothe

Chillicothe, Ohio

Chillicothe is a city in and the county seat of Ross County, Ohio, United States.Chillicothe was the first and third capital of Ohio and is located in southern Ohio along the Scioto River. The name comes from the Shawnee name Chalahgawtha, meaning "principal town", as it was a major settlement of...

. Its eastern terminus is at a diamond interchange

Diamond interchange

A diamond interchange is a common type of road junction, used where a freeway crosses a minor road. The freeway itself is grade-separated from the minor road, one crossing the other over a bridge...

 with the U.S. Route 33 (US 33) expressway approximately 3.75 miles (6 km) northwest of Logan

Logan, Ohio

As of the census of 2000, there were 6,704 people, 2,790 households, and 1,768 families residing in the city. The population density was 2,175.2 people per square mile . There were 2,948 housing units at an average density of 956.5 per square mile...

.

Route description

Along its path, SR 180 travels through northeastern Ross County

Ross County, Ohio

As of the census of 2000, there were 73,345 people, 27,136 households, and 19,185 families residing in the county. The population density was 106 people per square mile . There were 29,461 housing units at an average density of 43 per square mile...

, the extreme southeastern corner of Pickaway County

Pickaway County, Ohio

As of the census of 2000, there were 52,727 people, 17,599 households, and 13,287 families residing in the county. The population density was 105 people per square mile . There were 18,596 housing units at an average density of 37 per square mile...

 and the northwestern part of Hocking County

Hocking County, Ohio

Hocking County is a county located in the state of Ohio, United States. As of 2010, the population was 29,380. Its county seat is Logan. Its name is from the Hocking River, the origins of which are disputed but is said to be a Delaware Indian word meaning "bottle river".-Geography:According to the...

. No portion of this highway is included within the National Highway System

National Highway System (United States)

The National Highway System is a network of strategic highways within the United States, including the Interstate Highway System and other roads serving major airports, ports, rail or truck terminals, railway stations, pipeline terminals and other strategic transport facilities.Individual states...

 (NHS). The NHS is a network of routes determined to be most important for the economy, mobility and defense of the nation.

History

The SR 180 designation was applied in 1927. Prior to this time, the stretch of highway that SR 180 currently occupies through Ross, Pickaway and Hocking Counties was designated as SR 27. With the debut of the US 27 in that year, SR 27 was replaced by SR 180. The only change related to SR 180 since its inception has been the highway that it meets at its eastern terminus, which at the time was the predecessor to US 33, SR 31.

Major intersections