Ouachita Parish, with an area of 642 square miles, is located in the northeastern portion of Louisiana. Monroe, the largest city in northeast Louisiana, is centrally located in the parish on the flood plain of the Ouachita River. (See map.)
Ouachita Parish, with an area of 642 square miles, is located in the northeastern portion of Louisiana. Monroe, the largest city in northeast Louisiana, is centrally located in the parish on the flood plain of the Ouachita River. (See map.)