Henry Clay Putnam (January 17, 1846 – July 7, 1913) was an American businessman, Republican politician, and Wisconsin pioneer.

He served four years each in the Wisconsin State Senate and Assembly, representing Green County.

He was educated in the common schools in Green County until age 16, when he enlisted in the Union Army.

[1] Putnam enlisted in the Summer of 1863 and was enrolled as a private in Company B of the 1st Wisconsin Cavalry Regiment.

[4] Putnam was active for the remainder of his life in the Wisconsin chapter of the Grand Army of the Republic.