John Milton Killits (October 7, 1858 – September 13, 1938) was a United States federal judge.Born in Lithopolis, Ohio, Killits received an A.B. from Williams College in 1880, an LL.B. from Columbian University in 1885, an LL.M. from Columbian University in 1886, and an A.M. from Williams College in 1887.