Lewisville is a village in Monroe County, Ohio, United States. According to the United States Census Bureau, the village has a total area of 0.37 square miles, all of it land. As of the census of 2010, there were 176 people, 76 households, and 48 families living in the village. The population density was 475.7 inhabitants per square mile. There were 97 housin…Lewisville is a village in Monroe County, Ohio, United States. According to the United States Census Bureau, the village has a total area of 0.37 square miles, all of it land. As of the census of 2010, there were 176 people, 76 households, and 48 families living in the village. The population density was 475.7 inhabitants per square mile. There were 97 housing units at an average density of 262.2 per square mile. The racial makeup of the village was 98.3% White, 0.6% Asian, and 1.1% from two or more races. Hispanic or Latino of any race were 0.6% of the population.