Louros (Greek: Λούρος) is a town and a former municipality in the Preveza regional unit, Epirus, Greece. Since the 2011 local government reform it is part of the municipality Preveza, of which it is a municipal unit. The seat of the municipality was the small town of Louros (pop. 1,938 in 2011). The area of the municipal unit is 176.075 km², with a population of 4,581 people (2011). The town and municipal unit are named after the river Louros which flows just south of the town. Until recently, the Louros valley was swampy, but in modern times the marshes were drained and are now used for the production of olives, oranges and tomatoes. Besides the town of Louros itself, the largest towns in the municipality are Néos Oropós (pop. 1,304), Stefáni (440), Vrysoúla (172), Áno Ráchi (127), and Án