Henry Harnden (March 4, 1823 – March 17, 1900) was an American sailor, Republican politician, and Wisconsin pioneer. He served as a Union Army officer during the American Civil War and led the Wisconsin cavalry regiment which was credited in the capture of Confederate president Jefferson Davis. After the war, he was granted an honorary brevet to brigadier general. He also went on to serve one term in the Wisconsin State Assembly, representing eastern Jefferson County.