Arkansas is a state located in the southern region of the United States. Its name is an Algonquin name of the Quapaw Indians. Arkansas shares a border with six states, with its eastern border largely defined by the Mississippi River.

Its diverse geography ranges from the mountainous regions of the Ozarks and the Ouachita Mountains, which make up the U.S. Interior Highlands, to the eastern lowlands along the Mississippi River. The capital and most populous city is Little Rock, located in the central portion of the state.

The name "Arkansas" derives from the same root as the name for the state of Kansas. The Kansas tribe of Native Americans are closely associated with the Sioux tribes of the Great Plains. The word "Arkansas" itself is a French pronunciation ("Arcansas") of a Quapaw (a related "Kaw" tribe) word "akakaze" meaning "land of downriver people" or the Sioux word "Akakaze" meaning "people of the south wind". The pronunciation of Arkansas was made official by an act of the state legislature in 1881, after a dispute between the two U.S. Senators from Arkansas.