Ouachita

Ouachita may refer to:

In geography:

• Ouachita Mountains
• Ouachita orogeny the geologic event that raised the Ouachita Mountains
• Ouachita River
• Ouachita Parish, Louisiana
• Ouachita County, Arkansas
• Ouachita National Forest
• Ouachita National Recreation Trail

In Native American studies:

• Ouachita people, a Caddo group from northeastern Louisiana

In education:

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

In business:

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

In nature:

• Ouachita Dusky Salamander, a species of salamander
• Ouachita madtom, a type of catfish
• Ouachita Mountain shiner, a species of minnow
• Ouachita rock pocketbook, a species of bivalve