Alvan Flanders (August 2, 1825 – March 14, 1894)[1] was an American businessman and politician who served as the 8th governor of Washington Territory from 1869 to 1870.

A member of the Republican, he previously served as the U.S. representative for Washington Territory's at-large congressional district from 1867 to 1869.

He was appointed by President Grant as Governor of the Territory of Washington on April 5, 1869, and served until 1870.

He was interred at Laurel Hill Cemetery which no longer exists, and his re-interment location is unknown.

[5] This article incorporates public domain material from the Biographical Directory of the United States Congress