State Route 172 is an 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 northeastern 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...

. Its western terminus is at its interchange with U.S. Route 30 about 1 miles (1.6 km) west of East Greenville near Dalton

Dalton, Ohio

Dalton is a village in Wayne County, Ohio, United States. The population was 1,605 at the 2000 census. Dalton is served by a branch of the Wayne County Public Library.-Geography:Dalton is located at ....

, and its eastern terminus is at U.S. Route 30 about 2 miles (3.2 km) west of Lisbon

Lisbon, Ohio

Lisbon is a village in Center Township, Columbiana County, Ohio, United States. The population was 2,788 at the 2000 census. It is the county seat of Columbiana County.-History:...

. The route stays near the U.S. Route 30 for its entire route, and some of the current Route 172 actually served as previous alignments of U.S. 30.

Major intersections

History

• 1926 – Original State Highway established; Originally routed from East Canton
  East Canton, Ohio
  East Canton is a village in Stark County in the U.S. state of Ohio. The population was 1,629 at the 2000 census. It is part of the Canton–Massillon Metropolitan Statistical Area....
  
   to New Franklin
  New Franklin, Stark County, Ohio
  .New Franklin is an unincorporated community in northeastern Paris Township, Stark County, Ohio, United States, lying at the intersection of State Routes 172 and 183. The community is part of the Canton–Massillon Metropolitan Statistical Area....
  
   .
• 1939 – Extended to the current eastern terminus outside of Lisbon
  Lisbon, Ohio
  Lisbon is a village in Center Township, Columbiana County, Ohio, United States. The population was 2,788 at the 2000 census. It is the county seat of Columbiana County.-History:...
  
  .
• 1974 - Extended to the current western terminus 1 miles (1.6 km) west of East Greenville.