Saitō Tomonobu (斎藤 朝信, 1527 – 1591) was an officer under the Uesugi clan following the Sengoku period of the 16th century.
During the expedition into the Kantō region, and the Invasion of Etchu, he indeed made quite a name for himself. Other than being a grand warrior, it is known that in administration skills, he was very gifted. Uesugi Kenshin placed him in a high place of trust. Serving under Uesugi Kagekatsu, after the death of his previous lord, Kenshin. Pushing back many attacks from that of the Oda.