Merrydale is an unincorporated area and census-designated place (CDP) in East Baton Rouge Parish, Louisiana, United States.

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.

According to the United States Census Bureau, the Merrydale CDP has a total area of 4.2 square miles (11.0 km2), all land.

[2] As of the 2020 United States census, there were 9,227 people, 2,901 households, and 2,026 families residing in the CDP.

East Baton Rouge Parish Public Schools serves Merrydale.

As of 2016[update] Lanier is under control of the Recovery School District (RSD), and so Merrydale Elementary, directly controlled by EBR Parish Schools, is an option for Lanier areas.