Goose Creek is a 53.9-mile-long (86.7 km)[1] tributary of the Potomac River in Fauquier and Loudoun Counties in Northern Virginia.

The creek initially flows eastward down the mountain, falling 600 feet (180 m) in its first 10 miles (16 km).

Once in Loudoun, the creek continues in a northeastward direction for 15 miles (24 km) to the western foot of Catoctin Mountain, where it turns to the north briefly, before reaching the confluence of the North Fork and then turning to the east and cutting through a gap in the mountain.

The North Fork of Goose Creek rises at the east end of Sleeter Lake in Round Hill and flows 13.3 miles (21.4 km)[1] in a southeastward direction, joining with the main branch in the water gap of Catoctin Mountain.

Goose Creek Bridge on the Ashby's Gap Turnpike was the site of a Civil War battle in the Loudoun Valley during the Gettysburg Campaign in 1863.