Kathie Durst wurde am 15 Juni 1952 in Queens, New York City, New York, USA geboren. Sie war mit Robert Durst verheiratet. Sie starb am 31 Januar 1982 in South Salem, New York, USA.
Kathie disappeared in 1982 and no body was found. Her husband, Robert Durst, divorced Kathie Durst in 1990 citing abandonment. At the request of Kathie's family, she was declared legally dead in 2017. In 2021, Robert Durst was formally charged with her 1982 murder.