Greenville Creek is a 44.4 miles (71.5 km) tributary of the Stillwater River

Stillwater River (Ohio)

The Stillwater River is a tributary of the Great Miami River in western Ohio in the United States. Via the Great Miami and Ohio rivers, it is part of the Mississippi River watershed....

 in southwestern 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...

 in the United States

United States

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

. Via the Stillwater River, the Great Miami River

Great Miami River

The Great Miami River is a tributary of the Ohio River, approximately long, in southwestern Ohio in the United States...

, and the Ohio River

Ohio River

The Ohio River is the largest tributary, by volume, of the Mississippi River. At the confluence, the Ohio is even bigger than the Mississippi and, thus, is hydrologically the main stream of the whole river system, including the Allegheny River further upstream...

, its water flows to the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 and ultimately the Gulf of Mexico

Gulf of Mexico

The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

. The creek starts in extreme eastern Indiana

Indiana

Indiana is a US state, admitted to the United States as the 19th on December 11, 1816. It is located in the Midwestern United States and Great Lakes Region. With 6,483,802 residents, the state is ranked 15th in population and 16th in population density. Indiana is ranked 38th in land area and is...

 in Randolph County

Randolph County, Indiana

Randolph County is a county located in the U.S. state of Indiana. As of 2010, the population was 26,171. The county seat is Winchester.-History:...

. It soon flows into Darke County, Ohio

Darke County, Ohio

As of the census of 2000, there were 53,309 people, 20,419 households, and 14,905 families residing in the county. The population density was 89 people per square mile . There were 21,583 housing units at an average density of 36 per square mile...

, and joins with a tributary that also starts in Indiana, Dismal Creek. It flows through Greenville

Greenville, Ohio

Greenville is a city in Darke County, Ohio, United States. The population was 13,227 at the 2010 census. It is the county seat of Darke County.-History:Greenville is the historic location of Fort Greene Ville,Greenville is a city in Darke County, Ohio, United States. The population was 13,227 at...

 and Gettysburg

Gettysburg, Ohio

Gettysburg is a village in Darke County, Ohio, United States. The population was 558 at the 2000 census.-History:Gettysburg was founded by natives of Adams County, Pennsylvania in the late 1820s. When the settlement was platted in 1842, the community was named for Gettysburg, the county seat of...

 before entering 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...

. Near its confluence with the Stillwater River at Covington

Covington, Ohio

Covington is a village in Miami County, Ohio, United States. The population was 2,559 at the 2000 census. It is part of the Dayton Metropolitan Statistical Area. The village was incorporated as Covington in 1835...

it drops 20 feet (6.1 m) at Greenville Falls in a glacially-cut gorge that is a state nature preserve.