Aquia Harbour is a census-designated place (CDP) in Stafford County, Virginia, United States, 13 miles (21 km) north of Fredericksburg.

Aquia Church, erected in 1757 and now a National Historic Landmark, is located west of the community.

As of the 2010 Census,[4] there were 6,727 people, 2,223 households, and 1,914 families residing in the CDP.

The racial makeup of the CDP was 84.8% White, 7.7% Black or African American, 0.6% Native American, 2.2% Asian, 0.10% Pacific Islander, 1.3% from other races, and 3.3% from two or more races.

There were 2,223 households, out of which 38.1% had children under the age of 18 living with them, 75.6% were married couples living together, 7.2% had a female householder with no husband present, and 13.9% were non-families.