Kristin Harmon (born June 25, 1945) is an American actress. She is the daughter of American football star Tom Harmon and actress Elyse Knox, and the sister of actor Mark Harmon and actress Kelly Harmon. She was married to actor and musician Ricky Nelson from 1963 to 1981. Their children include actress Tracy Nelson and the twins Matthew and Gunnar Nelson, who were members of the rock band Nelson.

In 1987, claiming that she was an unfit mother, Harmon's brother Mark and his wife, actress Pam Dawber, sued her for custody of her youngest son, Sam.