- 1 Manassas — the county seat.
- 2 Woodbridge — a major shopping destination for Potomac Mills Outlets. Near Dale City, on the southern coast of the county
- 3 Quantico — A town on the Potomac. The other three sides are srounded by the largest marine base in the world, Marine Corps Base Quantico.
- 4 Bristow
- 5 Triangle
- Manassas National Battlefield Park, . Site of both the first and second Battles of Bull Run.
Otherwise, the main artery is without question I-95. Interstate 66 also crosses through the northern part of country.
Sightseeing in Prince William County is overwhelmingly military-related: the National Museum of the Marine Corps and Manassas Battlefield National Park, both of which attract a lot of residents and other out-of-state tourists coming down from D.C.
The Potomac Mills Outlets are the other big regional draw, again bringing in the visitors from D.C.