It is said that less than 1% of couples are in open marriages, Neil explains. Twenty-percent of couples have experimented with consensual non monogamy [but] open marriage has a 92% failure rate. Eighty-percent of people in open marriages experience jealousy of the other.

What percentage of couples have an open marriage?

Research tells us that about 4 to 5 percent of heterosexual couples have agreed to have an open relationship. In other words, theyve given their consent to not be monogamous. That may seem like a relatively small and, given the stigma surrounding open relationships, unsurprising number.

How many married couples have open marriages?

The best evidence suggests around 4 percent of adults. That may not sound like many, but it means one couple in 25. If you know two dozen couples, chances are one participates in consensual non-monogamy (CNM), also known as “open” relationships. Put another way, 4 percent means some 2.8 million U.S. couples.