Mount Holly is an unincorporated community and census-designated place (CDP) in Union County, Arkansas, United States.

Mount Holly is located at the junction of Arkansas highways 57 and 160, 18 miles (29 km) west-northwest of El Dorado.

Mount Holly has a post office with ZIP code 71758.

It was previously served by the Mount Holly School District, which operated Mt.

This article about a location in Union County, Arkansas is a stub.