Baron Yamakawa Hiroshi (山川 浩, 4 December 1845 – 6 March 1898) was a Bakumatsu period Aizu samurai who subsequently became a general in the early Meiji period Imperial Japanese Army, and a noted politician and educator. He was also one of the first persons (together with his brother Yamakawa Kenjirō) to write a history of the Aizu War from the Aizu perspective. His brother-in-law was noted general Oyama Iwao, who married his sister Sutematsu.