Byron W. Preston (February 13, 1858 – January 18, 1939) was a justice of the Iowa Supreme Court from 1913 to December 31, 1924, appointed from Mahaska County, Iowa.

Byron W. Preston was born in Newton, Iowa on February 13, 1858.

He attended Iowa College, worked in the mercantile business, read law, and was admitted to the bar in 1884.

[1] He worked as a county attorney, city attorney, and district court judge before being elected to the Iowa Supreme Court.

[1] He died at his home in Oskaloosa, Iowa on January 18, 1939.