Quiet Dell is an unincorporated community in Harrison County, West Virginia, United States.

Quiet Dell is located at the junction of Interstate 79 and West Virginia Route 20, 5 miles (8.0 km) southeast of Clarksburg.

Key retail businesses in Quiet Dell include the 7-Eleven-BP and Exxon gas stations, Dollar General, and Stonewood Bulk Foods.

Tourist attractions include the Civilian Conservation Corps (CCC) Museum in the old school, and Primitives, a crafting cooperative.

In 1931, Quiet Dell was the scene of multiple murders committed by serial killer Harry Powers (Herman Drenth).