Fountainhead-Orchard Hills is a census-designated place (CDP) in Washington County, Maryland, United States.

According to the United States Census Bureau, the CDP has a total area of 3.8 square miles (9.8 km2), all land.

At the 2000 census there were 3,844 people, 1,546 households, and 1,119 families living in the CDP.

There were 1,621 housing units at an average density of 424.8 per square mile (164.0/km2).

The racial makeup of the CDP was 94.35% White, 2.29% African American, 0.10% Native American, 1.90% Asian, 0.03% Pacific Islander, 0.31% from other races, and 1.01% from two or more races.