Several studies assume that Calvinist Christianity severely undermined or even persecuted the practice of polyandry in the Sri Lankan areas under Dutch control. We analyze Dutch colonial policy and Church activities toward polyandry by combining ecclesiastical and legal sources. Moreover, we use the Dutch colonial administration of the Sinhalese population to estimate the prevalence of polyandry. We conclude that polyandry was far from extinct by the end of the Dutch period and we argue that the colonial government was simply not knowledgeable, interested and effective enough to persecute the practice in the rural areas under its control.