In 1973, Kathleen married David Lee Townsend (born 1947), whom she had met when he was a graduate student and her tutor at Radcliffe. As of April 2020, David is a member of the faculty at
St. John's College in Annapolis. They have four daughters: • Meaghan Anne Kennedy Townsend (born November 7, 1977) •
Maeve Fahey Kennedy Townsend (November 1, 1979 – April 2, 2020) • Rose Katherine "Kat" Kennedy Townsend (born December 17, 1983) • Kerry Sophia Kennedy Townsend (born November 30, 1991) On June 27, 2011, Maeve gave birth to a son named Gideon Joseph Kennedy McKean. Gideon was the first great-grandchild for Bobby and Ethel, as well as the first of the fifth generation of Kennedys. Maeve and son Gideon went missing, and were presumed dead, in a canoeing accident that occurred on April 2, 2020. After 26 hours, the recovery mission was suspended. Maeve's body was found in the
Chesapeake Bay on April 6 and Gideon's body was recovered two days later. His body was from where his mother's was found.{{cite news |url=https://www.nbcwashington.com/news/local/body-of-8-year-old-kennedy-family-member-found-after-canoe-accident/2268268/|title=Body of 8-Year-Old Kennedy Family Member Found After Canoe Accident |date=April 8, 2020 |newspaper=NBC 4 Washington |first=Andrea ==Boards==