Manassas, VA is the county seat of Prince William County and is the largest town in the county with over 45,000 residents. There is plenty of history in Manassas as the first battles of the Civil War were fought here. You can visit the site at the Manassas National Battlefield Park. You’ll feel the history as you walk the streets of old town Manassas visiting the quaint shops and restaurants. Like all of Prince William County, the area has seen significant population growth and you’ll find plenty of shopping, restaurants and entertainment including three outdoor water parks. The Manassas Regional Airport is the busiest general aviation airport in Virginia.