This research is about "The History of the Development of Catholicism in Bagansiapiapi (1928-1942)” . In 1930 Bagansiapiapi was dominated by ethnic Chinese who were immigrants from China. Who are Buddhists and Confucians. In addition, there are also indigenous Bagansiapiapi people, namely Malay people who are Muslim. The entry of Catholicism begin with the entry of the Neterland in Bagansiapi…