Open marriage jealousy refers to thoughts, feelings, and behaviors associated with romantic rivalry and jealousy within an open marriage.

Couples in open marriage expose themselves to situations that can potentially provoke jealousy. Most couples in open marriages report experiencing jealousy at some point during their marriage. Couples in open marriages also experience jealousy more frequently than couples in sexually monogamous marriages. Ground rules are one way to help manage jealousy in open relationships. However, ground rules may not be sufficient. Couples in open marriages may benefit from a general understanding of jealousy and how to cope with it.