(Pew Research Center) Polygamy is rare throughout most of the world. In the U.S., having spouselike relationships with more than one person under the same roof was criminalized in 1882. Today, people in the U.S. are rarely prosecuted for living with multiple romantic partners, but every state has laws against getting married while already being married to someone else.
In February, Utah passed a bill to reduce the penalties for adults who voluntarily live in polygamous relationships, making the practice an infraction, a low-level offense that is not punishable with jail time.
In other parts of the world, including swaths of the Middle East and Asia, polygamy is legal but not practiced widely. And in some countries – particularly in a segment of West and Central Africa known as the polygamy belt – the practice is frequently legal and widespread.