Mad River Township is one of the twelve townships

Civil township

A civil township is a widely used unit of local government in the United States, subordinate to, and geographic divisions of, a county. Specific responsibilities and the degree of autonomy vary based on each state. Civil townships are distinct from survey townships, but in states that have both,...

 of Champaign County

Champaign County, Ohio

As of the census of 2000, there were 38,890 people, 14,952 households, and 10,870 families residing in the county. The population density was 91 people per square mile . There were 15,890 housing units at an average density of 37 per square mile...

, 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...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The 2000 census

United States Census, 2000

The Twenty-second United States Census, known as Census 2000 and conducted by the Census Bureau, determined the resident population of the United States on April 1, 2000, to be 281,421,906, an increase of 13.2% over the 248,709,873 persons enumerated during the 1990 Census...

 found 2,650 people in the township.
Located in the southwestern part of the county, it borders the following townships:

• Concord Township
  Concord Township, Champaign County, Ohio
  Concord Township is one of the twelve townships of Champaign County, Ohio, United States. The 2000 census found 1,408 people in the township.-Geography:Located in the western part of the county, it borders the following townships:*Harrison Township - north...
  
   - north
• Salem Township
  Salem Township, Champaign County, Ohio
  Salem Township is one of the twelve townships of Champaign County, Ohio, United States. The 2000 census found 2,307 people in the township, 2,296 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - northeast corner
• Urbana Township
  Urbana Township, Champaign County, Ohio
  Urbana Township is one of the twelve townships of Champaign County, Ohio, United States. The 2000 census found 14,968 people in the township, 3,366 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - east
• Moorefield Township, Clark County
  Moorefield Township, Clark County, Ohio
  Moorefield Township is one of the ten townships of Clark County, Ohio, United States. The 2000 census found 11,402 people in the township.-Geography:Located in the northern part of the county, it borders the following townships:...
  
   - southeast corner
• German Township, Clark County
  German Township, Clark County, Ohio
  German Township is one of the ten townships of Clark County, Ohio, United States. The 2000 census found 7,336 people in the township, 7,012 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - south
• Pike Township, Clark County
  Pike Township, Clark County, Ohio
  Pike Township is one of the ten townships of Clark County, Ohio, United States. The 2000 census found 3,891 people in the township, 3,521 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - southwest corner
• Jackson Township
  Jackson Township, Champaign County, Ohio
  Jackson Township is one of the twelve townships of Champaign County, Ohio, United States. The 2000 census found 2,535 people in the township, 1,763 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - west
• Johnson Township
  Johnson Township, Champaign County, Ohio
  Johnson Township is one of the twelve townships of Champaign County, Ohio, United States. The 2000 census found 3,357 people in the township, 1,578 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - northwest

No municipalities are located in Mad River Township, although the unincorporated communities

Unincorporated area

In law, an unincorporated area is a region of land that is not a part of any municipality.To "incorporate" in this context means to form a municipal corporation, a city, town, or village with its own government. An unincorporated community is usually not subject to or taxed by a municipal government...

 of Thackery

Thackery, Ohio

Thackery is an unincorporated community in southeastern Jackson and southwestern Mad River Townships in Champaign County, Ohio, United States. It lies along State Route 55, southwest of the city of Urbana, the county seat of Champaign County.-References:...

 and Westville

Westville, Ohio

Westville is an unincorporated community in northeastern Mad River Township, Champaign County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code of 43083. It lies at the intersection of U.S. Route 36 with State Route 560....

 lie in the township's southwest and northeast respectively.
Named for the river

Mad River (Ohio)

The Mad River is a stream located in the west central part of the U.S. state of Ohio. It flows from Logan County to downtown Dayton, where it meets the Great Miami River. The stream flows southwest from its source near Campbell Hill through West Liberty, along U.S...

 that flows through it, it is one of three Mad River townships statewide.