William Price Elmer (March 2, 1871 – May 11, 1956) was a U.S. Representative from Missouri. Born in Robertsville, Missouri to William J. and Sarah (Wagoner) Elmer, the family moved to Salem, Missouri in 1875. Elmer attended the public schools and Wingo Law School in Salem, Missouri. He was admitted to the bar in 1892 and commenced practice in Salem, Missouri which is the county seat of Dent County. He served as prosecuting attorney for Dent County, Missouri, in 1895 and 1896 and again in 1905 and 1906. He served as member of the State house of representatives in 1903, 1904, 1921, 1922, and 1929–1933, including the position of temporary speaker and floor leader in 1929. Elmer served as city attorney of Salem, Missouri from 1920 to 1930. He served as delegate or alternate to the Republican N