On December 11, 2015, Vuolo began a relationship with reality-TV personality Jinger Duggar. On July 26, 2016, after a brief seven month "courtship", the couple announced their engagement. Duggar and Vuolo were married on November 5, 2016. On January 3, 2018, Vuolo and his wife announced they were expecting their first child, due in July. On April 9, the couple revealed they were expecting a girl. Their daughter, Felicity Nicole Vuolo, was born on July 19, 2018. On May 28, 2020, Vuolo and his wife announced that they are expecting their second child after a miscarriage in fall of 2019.