Job Barnard (June 8, 1844 – February 28, 1923) was a United States federal judge.
Born in Porter County, Indiana, Barnard served in the United States Army during the American Civil War, from 1861 to 1865, and then received an LL.B. from the University of Michigan in 1867. He was in private practice in Crown Point, Indiana from 1867 to 1873. He was an assistant clerk for the District of Columbia Supreme Court from 1873 to 1876, returning to private practice in Washington, D.C. from 1876 to 1899, and teaching as a professor in the Georgetown University Law School.
On October 1, 1899, Barnard received a recess appointment from William McKinley to a seat on the United States District Court for the District of Columbia vacated by Walter S. Cox. Formally nominated on December 11, 1899, Barnard was confirmed by the United States Senate on December 19, 1899, and received his commission the same day. Barnard's service was terminated on June 8, 1914, due to retirement.
He died in Washington, D.C.