Mixed marriages in Indonesia were initially reguleted through GHR S. 1898-158, which enabled the mixed marriages of candidate husbands/wives who possessed certain differences. Thus,the regulation was withdrawn through the introduction of Law Number 1 of 1974 regarding marriages. Regarding mixed marriages, in accordance with Article 57, the allowed mixed marriages were the one which candidate husbands/wives who possessing different nationalities, and of which the marriages were performed in Indonesia.

When the difference of the candidate husband or wife lies in their respective religion, then the marriage would still be possible to be established outside Indonesia provided it is allowed in that particular country and as long as the Indonesian citizen taking part in that marriage does not transgress any marriage laws in Indonesia. A marriage between people with different denominations is allowed in Indonesia.