When Kathleen Poulson was born on 10 December 1926, in Sanford, Conejos, Colorado, United States, her father, Frank Poulson, was 23 and her mother, Velma C Christensen, was 21. She married Albert McIntire Mortensen on 20 September 1946, in Sanford, Conejos, Colorado, United States. They were the parents of at least 1 son and 1 daughter. She died on 11 January 2013, in St. George, Washington, Utah, United States, at the age of 86, and was buried in Sanford, Conejos, Colorado, United States.