State Route 201 is a 22.76 miles (36.6 km) long north–south 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 western 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...

. The southern terminus of SR 201 is at an interchange with the SR 4 freeway in Dayton

Dayton, Ohio

Dayton is the 6th largest city in the U.S. state of Ohio and the county seat of Montgomery County, the fifth most populous county in the state. The population was 141,527 at the 2010 census. The Dayton Metropolitan Statistical Area had a population of 841,502 in the 2010 census...

. Its northern terminus terminus is at a T-intersection with SR 55 approximately 3.25 miles (5.2 km) east of Casstown

Casstown, Ohio

Casstown is a village in Miami County, Ohio, United States. The population was 322 at the 2000 census. It is part of the Dayton Metropolitan Statistical Area.-Geography:Casstown is located at ....

.

Route description

Along its path, SR 201 passes through the eastern portion of Montgomery County

Montgomery County, Ohio

Montgomery County is a county located in the state of Ohio, United States. The population was 535,153 in the 2010 Census. It was named in honor of Richard Montgomery, an American Revolutionary War general killed in 1775 while attempting to capture Quebec City, Canada. The county seat is Dayton...

 and the eastern portion of Miami County

Miami County, Ohio

As of the census of 2000, there were 98,868 people, 38,437 households, and 27,943 families residing in the county. The population density was 243 people per square mile . There were 40,554 housing units at an average density of 100 per square mile...

. There are segments of SR 201 that are included as a part of 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 highways that are identified as being most important for the economy, mobility and defense of the nation.

History

The SR 201 designation was applied in 1923. It was originally routed from its southern terminus in Dayton to its junction with US 40 in Brandt

Brandt, Ohio

Brandt is an unincorporated community in southern Bethel Township, Miami County, Ohio, United States. It was formed on the National Road as a stop for travelers on the road and for road toll-takers. It was laid out in 1839 by the Voorhis brothers. A toll gate was located at the east end of...

. SR 201 was extended to the north in 1937, routed from US 40 in Brandt

Brandt, Ohio

Brandt is an unincorporated community in southern Bethel Township, Miami County, Ohio, United States. It was formed on the National Road as a stop for travelers on the road and for road toll-takers. It was laid out in 1839 by the Voorhis brothers. A toll gate was located at the east end of...

 to SR 55.

Major intersections