Bigamy is the act of marrying one person while being legally married to another. Polygamy is the practice or custom (often religious) of having more than one wife or husband at a time. Most states prohibit a party from having more than one marriage license at a time, and in most states bigamy is a crime.
In Michigan, both bigamy and polygamy are prohibited by law. Under Michigan Penal Code (MCL 750.439), bigamy is defined as the act of marrying another person while already being legally married to someone else. This offense is considered a felony in Michigan, and a person convicted of bigamy can face a penalty of up to four years in prison, a fine of up to $5,000, or both. Polygamy, which involves having more than one spouse simultaneously, is not explicitly defined in Michigan statutes, but it falls under the umbrella of bigamy and is therefore also illegal. The state does not recognize marriages that involve more than two people, and it is not possible to legally obtain more than one marriage license at a time. It's important to note that these laws are in place regardless of whether the polygamous relationships are based on religious practices or personal choices.