Every two years, the Prince William Chamber of Commerce partners with Target Marketing to produce a street detail map of Prince William County and the Cities of Manassas and Manassas Park. Member-exclusive advertising options are available. These popular maps are used by residents and visitors alike to navigate through our community. Advertisers also gain ongoing visibility with an online version posted on the homepage of the Chamber website. For information on advertising options on the next Prince William Map, call 800- 933-3909.