Manassas County Virginia has 4 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Manassas Industrial School for Colored Youth, Cannon Branch Fort, Manassas Historic District.
Some of the country's most noteable architects helped create the Manassas County places including Albert Speiden. Prominent architectural styles found in Manassas Country are Late 19th And 20th Century Revivals and Late Victorian.