Ouachita

Ouachita may refer to:

Places
In the United States:
 * Ouachita, Arkansas, an unincorporated community
 * Ouachita City, Louisiana, an unincorporated community
 * The Ouachita Mountains in Arkansas and Oklahoma
 * The Ouachita orogeny, the geologic event that raised the Ouachita Mountains
 * The Ouachita River in Arkansas and Louisiana
 * Lake Ouachita
 * Ouachita County, Arkansas
 * Ouachita Parish, Louisiana
 * Ouachita National Forest in Arkansas and Oklahoma
 * Ouachita National Recreation Trail in Arkansas and Oklahoma

Native Americans

 * The Ouachita people, a Caddo group from northeastern Louisiana

Education

 * Ouachita Baptist University, a private liberal arts institution in Arkansas
 * Ouachita Hills College, a missionary training college in southwest Arkansas

Business

 * Ouachita Railroad, a Class III short-line railroad headquartered in Arkansas
 * Ouachita Electric Cooperative, a rural electric utility cooperative

Nature

 * Ouachita creekshell, a species of mussel
 * Ouachita darter, a species of darter
 * Ouachita dusky salamander, a species of salamander
 * Ouachita madtom, a species of catfish
 * Ouachita map turtle, a species of turtle
 * Ouachita pebblesnail, a species of snail
 * Ouachita rock pocketbook, another species of mussel
 * Ouachita shiner, a species of minnow
 * Ouachita streambed salamander, another species of salamander
 * Ouachita burrowing crayfish
 * Ouachita fencing crayfish
 * Ouachita mountain crayfish
 * Ouachita river crayfish