Daley's candidacy made the 2019 election the fourteenth Chicago mayoral election in which a member of his family has been a candidate. William's father won the 1955, 1959, 1963, 1967, 1971, and 1975 elections. His brother won the 1989, 1991, 1995, 1999, 2003, 2007, and was an unsuccessful candidate in the 1983 election. This means that a member of the Daley family participated in all but four of the eighteen Chicago mayoral elections held between 1955 and 2019 (with no member of the Daley family having run in the 1979, 1987, 2011, or 2015 elections).