High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Mount Carmel is a census-designated place (CDP) in Clermont County, Ohio, United States. The population was 4,308 at the 2000 census. According to the United States Census Bureau, the CDP has a total area of 1.7 square miles (4.4 km²), all of it land. As of the census of 2000, there were 4,308 people, 1,702 households, and 1,172 families residing in the CDP. The population density was 2,559.3 people per square mile (990.1/km²). There were 1,790 housing units at an average density of 1,063.4/sq mi (411.4/km²).