William Augustus Reeder (August 28, 1849 – November 7, 1929) was a U.S. Representative from Kansas. Born near Shippensburg, Pennsylvania, Reeder moved with his parents to Ipava, Illinois, in 1853, attended the public schools, and taught school in Illinois 1863-1871. Reeder moved to Beloit, Kansas, in 1871, and served as principal of the Beloit public schools from 1871-1879. Reeder then moved to Logan, Kansas, in 1880, and engaged in banking there. Reeder was interested in irrigation farming 1891-1901.