West Monroe is a city in Ouachita Parish, Louisiana, United States. It is situated on the Ouachita River, across from the neighboring city of Monroe. The two cities are often referred to as the Twin Cities of northeast Louisiana. Its population was 13,065 at the 2010 census and it is part of the Monroe Metropolitan Statistical Area. The mayor, Dave Norris, a Democrat, has served since July 1, 1978, and was unopposed for a tenth term in the municipal election in 2014.