The Big Blue River is an 83.8 miles (134.9 km) tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Driftwood River

Driftwood River

The Driftwood River is a tributary of the East Fork of the White River in central Indiana in the United States. Via the White, Wabash and Ohio rivers, it is part of the watershed of the Mississippi River...

 in east-central 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 the United States

United States

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

. Via the Driftwood, White

White River (Indiana)

The White River is a two-forked river that flows through central and southern Indiana and is the main tributary to the Wabash River. Via the west fork, considered to be the main stem of the river by the U.S. Board on Geographic Names, the White River is long.-West Fork:The West Fork, long, is...

, Wabash

Wabash River

The Wabash River is a river in the Midwestern United States that flows southwest from northwest Ohio near Fort Recovery across northern Indiana to southern Illinois, where it forms the Illinois-Indiana border before draining into the Ohio River, of which it is the largest northern tributary...

 and Ohio

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...

 rivers, it is part of the watershed

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 of 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...

.

Course

The Big Blue rises in northeastern Henry County

Henry County, Indiana

As of the census of 2000, there were 48,508 people, 19,486 households, and 13,971 families residing in the county. The population density was 124 people per square mile . There were 20,592 housing units at an average density of 52 per square mile...

 and flows generally southwestwardly through Rush

Rush County, Indiana

As of the census of 2000, there were 18,261 people, 6,923 households, and 5,046 families residing in the county. The population density was 45 people per square mile . There were 7,337 housing units at an average density of 18 per square mile...

, Hancock

Hancock County, Indiana

Hancock County is a county located in the U.S. state of Indiana. As of 2010, the population was 70,002. The county seat is Greenfield.-Geography:...

, Shelby

Shelby County, Indiana

As of the census of 2000, there were 43,445 people, 16,561 households, and 12,056 families residing in the county. The population density was 105 people per square mile . There were 17,633 housing units at an average density of 43 per square mile...

 and Johnson

Johnson County, Indiana

As of the census of 2000, there were 115,209 people, 42,434 households, and 31,613 families residing in the county. The population density was 360 people per square mile . There were 45,095 housing units at an average density of 141 per square mile...

 counties, past the towns of New Castle

New Castle, Indiana

As of the census of 2000, there were 17,780 people, 7,462 households, and 4,805 families residing in the city. The population density was 2,987.5 people per square mile . There were 8,042 housing units at an average density of 1,351.3 per square mile...

, Knightstown

Knightstown, Indiana

Knightstown is a town in Wayne Township, Henry County, Indiana, along the Big Blue River. The population was 2,182 at the 2010 census. Knightstown is famous for the 1986 movie Hoosiers. The Hoosier Gym was used in the filming of the movie. Knightstown hosts two annual festivals. Jubilee Days held...

, Carthage

Carthage, Indiana

Carthage is a town in Ripley Township, Rush County, Indiana, along the Big Blue River. The population was 928 at the 2000 census.-Geography:Carthage is located at ....

, Morristown

Morristown, Indiana

Morristown is a town in Hanover Township, Shelby County, Indiana, United States. The population was 1,218 at the 2010 census.-Geography:Morristown is located at ....

, Shelbyville

Shelbyville, Indiana

Shelbyville is a city in Addison Township, Shelby County, Indiana, United States. The population was 17,951 at the 2000 census. The city is the county seat of Shelby County...

 and Edinburgh

Edinburgh, Indiana

Edinburgh is a town in Bartholomew, Johnson, and Shelby Counties in the U.S. state of Indiana. The population was 4,480 at the 2010 census. It is part of the Columbus, Indiana metropolitan statistical area. Edinburgh was named in honor of Edinburgh, Scotland and for many years was pronounced the...

. It joins Sugar Creek

Sugar Creek (Driftwood River)

Sugar Creek is an tributary of the Driftwood River in east-central Indiana in the United States. Via the Driftwood, White, Wabash and Ohio rivers, it is part of the watershed of the Mississippi River.-Course:...

 to form the Driftwood River 1 miles (1.6 km) west of Edinburgh. At Shelbyville, it collects the Little Blue River.