Belle Rose is a census-designated place (CDP) in Assumption Parish, Louisiana, United States. The population was 1,902 at the 2010 census. It is part of the Pierre Part Micropolitan Statistical Area.
Belle Rose is located at 30°2′13″N 91°3′15″W (30.036834, -91.054039).
According to the United States Census Bureau, the CDP has a total area of 5.4 square miles (13.9 km2), all land.
As of the census of 2000, there were 1,944 people, 674 households, and 514 families residing in the CDP. The population density was 362.5 people per square mile (140.0/km²). There were 725 housing units at an average density of 135.2 per square mile (52.2/km²). The racial makeup of the CDP was 39.92% White, 59.83% African American, 0.15% Native American, and 0.10% from two or more races. Hispanic or Latino of any race were 1.34% of the population.
There were 674 households out of which 34.7% had children under the age of 18 living with them, 50.0% were married couples living together, 20.2% had a female householder with no husband present, and 23.7% were non-families. 21.8% of all households were made up of individuals and 10.7% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.36.