Phelps-Roper and her sister moved to South Dakota after visiting the Black Hills. She is married to Chad Fjelland, an attorney whom she met through Twitter while advocating for the Westboro Baptist Church. Her daughter, Sølvi Lynne, was born in 2018. In October 2022, Phelps-Roper tweeted that she and Fjelland had welcomed a son, Tor Bjørn.
