Monogamy is legal in all 50 states. Maybe you're trying to ask about polygamy?
Monogamy = one spouse. I'm pretty sure it's legal everywhere.
Monogamy is legal in all 50 states. Mono- meaning one implies that you would only be married to one person. Are you meaning to ask about polygamy?
Monogamy (marrying just one person) is perfectly legal in the US. Polygamy, or Bigamy (the act or condition of a person marrying another person while still being lawfully married to a second person), on the other hand, is illegal in the United States. Bigamy is punishable either by a fine, imprisonment, or both, according to the law of the individual state and the circumstances of the offense.
Legal today in the US
Yes. There is nothing stopping you from having many partners. However, you may only legally marry one person at a time. If you marry more than one, you are guilty of bigamy, trigamy, and so on. However, be cautious of your state's bigamy laws... Some bigamy laws also apply to 'common law' marriages, meaning that if the public percieves you to be married to multiple partners or if you live with multiple partners, even if you are technically not married, then you can still be convicted. The good news (at least for those who want to practice polygamy) is that most states don't have the money or time to search out and convict people for bigamy, they have plenty of murderers, rapists, child abusers, and so forth to go after.
monogamy
Monogamy means the practice of having only one wife
My aunt is monogamy.
Monogamy - album - was created in 2000.
The Myth of Monogamy was created in 2001.
serial monogamy