Tadasuke Okubo (1537-9 November 1613) was a daimyo who was the lord of the Numazu Domain of Suruga Province. He fought under Ieyasu Tokugawa in the Battle of Komaki-Nagakute and many other battles, and after the 1600 Battle of Sekigahara was given the Numazu domain. Upon his death he left no heir and his lands were absorbed into the Tokugawa Shogunate.