Marriage was a inwardly and outwardly between a man and a woman to form a
family or household. Marriage is a right of every citizen of Indonesia. In forming
a family or household is not only between the couple but also must be based in
God Almighty, so in marriage religion is very important the validity of marriage.
But in public life often some marriage that is not based on religion but with the
love of the couple. Cases interfaith marriage in people’s live could be inflict a
variety of problems in the terms of the law such as the validity of a marriage,
because in article 2, paragraph (1) of Law No. 1 of 1974 on Marriage stating that
the marriage valid if performed by each religion and article 2 paragraph 2 of Law
No. 1 of 1974 on Marriage each of marriage is recorded in accordance with
applicable laws and regulations. The problems discussed in this thesis is validity
of marriage and registration interfaith marriage to the religion of Islam and
Catholic religion in the City of Yogyakarta. The method used is a normative legal
research is a research that focuses on the positive legal norms and made by
reviewing the laws and regulations in force. The result showed that interfaith
marriage is legitimate, because in Law No. 1 of 1974 does not regulate interfaith
marriage.