Harutiun Jangülian (; 1855 – 15 June 1915) was an Armenian historian, political activist, and member of the Armenian National Assembly. He was especially known for his involvement in the Kum Kapu demonstration. He spent six years imprisoned in exile. He returned to Constantinople and continued his political activity after his release. Jangülian was arrested on 24 April 1915, at the beginning of the Armenian genocide, deported, and ultimately executed.