Simatupang is one of Toba Batak clans originating in North Sumatra, Indonesia. People of this clan bear the clan's name as their surname. Notable people of this clan include: T. B. Simatupang, (1920–1990) Indonesian military officer Iwan Simatupang, (1928–1970) Indonesian novelist Sahala Hamonangan Simatupang, (1918–1992) Indonesian politician