Mich. Comp. Laws § 750.439
Polygamy-Any person who has a former husband or wife living, who shall marry another person, or shall continue to cohabit with such second husband or wife, in this state, he or she shall, except in the cases mentioned herein, be guilty of the crime of polygamy, a felony.
The provisions of this section shall not extend to any person whose husband or wife shall have voluntarily remained beyond the sea, or shall have voluntarily withdrawn from the other and remained absent for the space of five years next preceding such marriage, the party marrying again, not knowing the other to be living within that time, nor to any person who shall have good reason to believe such husband or wife to be dead, nor to any person who has been legally divorced from the bonds of matrimony.
MCL 750.439