Merrydale is an unincorporated area and census-designated place (CDP) in East Baton Rouge Parish, Louisiana, United States. The population was 9,772 at the 2010 census, down from 10,427 in 2000. It is part of the Baton Rouge Metropolitan Statistical Area.
Merrydale is located in central East Baton Rouge Parish at 30°30′15″N 91°6′58″W / 30.50417°N 91.11611°W / 30.50417; -91.11611 (30.504289, -91.116195). It is bordered to the south and west by Baton Rouge. U.S. Route 190, the Airline Highway, forms part of the southwest border of the community, and Louisiana Highway 37 (Greenwell Springs Road) forms part of the southern boundary. Downtown Baton Rouge is 7 miles (11 km) to the southwest.
According to the United States Census Bureau, the Merrydale CDP has a total area of 4.2 square miles (11.0 km), all land.
As of the census of 2000, there were 10,427 people, 3,284 households, and 2,666 families residing in the CDP. The population density was 2,445.2 people per square mile (945.0/km²). There were 3,483 housing units at an average density of 816.8 per square mile (315.7/km²). The racial makeup of the CDP was 8.70% White, 90.18% African American, 0.09% Native American, 0.17% Asian, 0.20% from other races, and 0.66% from two or more races. Hispanic or Latino of any race were 0.90% of the population.
There were 3,284 households out of which 47.3% had children under the age of 18 living with them, 46.0% were married couples living together, 30.1% had a female householder with no husband present, and 18.8% were non-families. 16.4% of all households were made up of individuals and 4.9% had someone living alone who was 65 years of age or older. The average household size was 3.15 and the average family size was 3.52.
In the CDP, the population was spread out with 34.6% under the age of 18, 10.9% from 18 to 24, 26.8% from 25 to 44, 20.9% from 45 to 64, and 6.8% who were 65 years of age or older. The median age was 29 years. For every 100 females, there were 87.3 males. For every 100 females age 18 and over, there were 79.0 males.
The median income for a household in the CDP was $28,544, and the median income for a family was $30,289. Males had a median income of $27,745 versus $19,518 for females. The per capita income for the CDP was $10,664. About 28.6% of families and 31.6% of the population were below the poverty line, including 42.7% of those under age 18 and 26.7% of those age 65 or over.