Law Enforcement Agencies in Manassas, VA VA › Prince William County Agencies serving the city of Manassas in VA. Agency Types in Manassas Campus Police 1 agencies County Jails 1 agencies Municipal Police 1 agencies National Park 1 agencies Parole Probation 1 agencies Probation Pretrial 1 agencies Sheriff 1 agencies All Agencies in Manassas, VA City of Manassas Police Department Prince William County Cmnty Corrections Probation & Parole Prince William County Manassas Natl Battlefield Park Prince William County Northern Virginia Cmnty College Prince William County Prince William County Sheriffs Office Prince William County Prince William/Manassas Prince William County US Probation & Pretrial Services Office Prince William County
