Potomac Mills is a census-designated place in Prince William County, Virginia, United States. The population as of the 2010 Census was 5,614. It consists of the Potomac Mills mall and surrounding residential and commercial area, adjoining Dale City and Lake Ridge.
Potomac Mills largely overlaps with the unincorporated community of Bethel.
Potomac Mills was first listed as a census designated place in the 2010 U.S. census formed from part of Dale City CDP and additional area.