Alden Sprague Sanborn (October 21, 1820 – November 19, 1885) was an American lawyer, politician, and judge.

He read law with Seth Austin, of Bradford, Vermont, and with Richard P. Marvin, at Jamestown, New York.

Also during this time, he was chosen by the Wisconsin Legislature as a commissioner to help identify a suitable location for the State Hospital for the Insane.

In Mazomanie, he was elected to three consecutive terms in the Wisconsin State Assembly, serving in the 1862, 1863, and 1864 sessions.

[3] Alden Sprague Sanborn married Huldah M. Eastman, of Haverhill, New Hampshire, in Milwaukee, on February 10, 1847.