In 1893, he married Hannah Lavinia Coppock in Chicago. She survived him until 1937. Gilfillan was Republican and a member of the Minneapolis Club, the Minnesota State Bar Association, and the Westminster Presbyterian Church until his death in 1924. He was interred at Lakewood Cemetery in Minneapolis. References 1835 births 1924 deaths People from Caledonia County, Vermont Republican Party Minnesota state senators Republican Party members of the United States House of Representatives from Minnesota