Honda Tadakatsu (?? ??, March 17, 1548 – December 3, 1610), also called Honda Heihachiro (?? ???) was a Japanese samurai, general (and later a daimyo) of the late Sengoku through early Edo periods, who served Tokugawa Ieyasu.
Honda Tadakatsu was one of the Tokugawa Four Heavenly Kings along with Ii Naomasa, Sakakibara Yasumasa and Sakai Tadatsugu.