Clarkson resides in New York City. In 2007, she purchased a loft in Greenwich Village for $1.5 million. She listed this loft property for $2.5 million in November 2018. She has never married and has no children. Interviewed in 2016, she said, "I've never wanted to marry, I've never wanted children – I was born without that gene." Three of Clarkson's four sisters have children and she is very close to her nieces and nephews. One of her nephews, Mac Alsfeld, is an actor, writer and director.