Interfaith marriages in Indonesia continue to be an issue, with ongoing social and legal discrimination, against couples who enter into such arrangement. This paper discusses the challenges faced by Undang-Undang No. 1 of 1974 on Marriage, along with its amendments in Undang-Undang No. 16 of 2019, in adhering to the principles of human rights. This study employs a literature review approach to examine how the government, through existing legal substance and structure, can ensure legal certainty, legal justice, and legal benefits for interfaith married couples.