David Davie Shelby (October 24, 1847 – August 22, 1914) was a United States federal judge.Born in Madison County, Alabama, Shelby attended Cumberland University and read law to enter the bar in 1870. He was a member of Army of the Confederacy in the United States Civil War. He was in private practice in Huntsville, Alabama from 1870 to 1899, serving as city attorney of Huntsville beginning in 1874. Shelby served as a member of Alabama State Senate from 1882 to 1884.