Marion Township is one of the thirteen 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 Clinton County

Clinton County, Ohio

Clinton County is a county located in the state of Ohio, United States. As of the 2010 census, the population was 42,040. The 2008 Census Population Estimate places the figure at 43,200. It is named for former U.S. Vice-President George Clinton...

, 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 5,489 people in the township, 1,269 of whom lived in the unincorporated portions of the township, up from 5,186 in 1990.

Geography

Located in the southwest corner of the county, it borders the following townships:

• Vernon Township
  Vernon Township, Clinton County, Ohio
  Vernon Township is one of the thirteen townships of Clinton County, Ohio, United States. The 2000 census found 2,685 people in the township, 2,188 of whom lived in the unincorporated portions of the township, up from 2,015 in 1990.-Geography:...
  
   - north
• Washington Township
  Washington Township, Clinton County, Ohio
  Washington Township is one of the thirteen townships of Clinton County, Ohio, United States. The 2000 census found 1,895 people in the township, up from 1,475 in 1990.-Geography:Located in the southern part of the county, it borders the following townships:...
  
   - northeast
• Jefferson Township
  Jefferson Township, Clinton County, Ohio
  Jefferson Township is one of the thirteen townships of Clinton County, Ohio, United States. The 2000 census found 1,301 people in the township, 1,036 of whom lived in the unincorporated portions of the township, down from 1,312 in 1990.-Geography:...
  
   - east
• Perry Township, Brown County
  Perry Township, Brown County, Ohio
  Perry Township is one of the sixteen townships of Brown County, Ohio, United States. The 2000 census found 4,830 people in the township, 4,367 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - south
• Wayne Township, Clermont County
  Wayne Township, Clermont County, Ohio
  Wayne Township is one of the fourteen townships of Clermont County, Ohio, United States. The 2000 census found 5,025 people in the township, 4,533 of whom lived in the unincorporated portions of the township.-Geography:...
  
   - southwest
• Harlan Township, Warren County
  Harlan Township, Warren County, Ohio
  Harlan Township, one of the eleven townships of Warren County, Ohio, United States, and the last to be formed in that county, is located in the southeast corner of the county...
  
   - west

The entire township lies in the Virginia Military District

Virginia Military District

The Virginia Military District was an approximately 4.2 million acre area of land in what is now the state of Ohio that was reserved by Virginia to use as payment for veterans of the American Revolutionary War....

.

Most of the village of Blanchester

Blanchester, Ohio

Blanchester is a village in Clinton and Warren Counties in the U.S. state of Ohio. The population was 4,220 at the 2000 census.-Geography:Blanchester is located at ....

is located in western Marion Township.

Historic population figures

Year	Marion Township	Blanchester Village
1910	2,533	1,813
1920	2,324	1,676
1930	2,192	1,597
1940	2,404	1,785
1950	2,749	2,109
1960	3,853	2,944
1970	1,412	3,080
1980	2,107	3,207
1990	5,186	4,206
2000	5,489	4,220

Government

The township is governed by a three-member board of trustees, who are elected in November of odd-numbered years to a four-year term beginning on the following January 1. Two are elected in the year after the presidential election and one is elected in the year before it. There is also an elected township fiscal officer, who serves a four-year term beginning on April 1 of the year after the election, which is held in November of the year before the presidential election. Vacancies in the fiscal officership or on the board of trustees are filled by the remaining trustees.