Passapatanzy is a census-designated place (CDP) in King George County, Virginia, United States. The population as of the 2010 Census was 1,283.
It was recorded as a Patawomeck village ruled by Japazaws, elder brother of the weroance, who conspired with Englishman Samuel Argall to capture Chief Powhatan's daughter, Matoaka (Pocahontas) on April 13, 1613. She was residing there with her husband, Kocoum. A historic marker about this event stands near the Potomac Creek Bridge on U.S. Route 1 in Stafford.