Polygamy in your nation

[Trad Japan]

Polygamy is legally unrecognised (and trying to defraud the Japanese authorities by entering into two marriages in Japan is illegal, whilst foreign polygynous marriages are not criminal but simply null and void).
Concubinage exists though and can be legally recognised through the use of contracts.
It is illegal for a woman to have affairs (including under colour of law) and is punishable by up to 14 years imprisonment.

[Droiden]

Polygamy of any kind is legal in Droiden.

[Zhouran]

Polygamy and polyandry are both illegal in Zhouran. When it comes to any multiple non-marriage relationships, the government couldn't care less about people's sex life.

[Communist Mars]

Polygamous relationships are not eligible for official recognition, only monogamous marriages or relationships can be legally and officially recognised. However polygamy is not in of itself criminal; it is, however, uncommon and not considered part of Martian culture.

[Alpinumtia]

Any form of polygamy is illegal within Alpinumtia after several incidents of domestic abuses occurred within the nation. According to Alpinumtian Family Law Section III Part I, it is considered a felony and highly frowned up by the Alpinumtian society. Offenders usually will be sentenced to five years in prison and fined 50,000 Corona.

[Kashimura]

There’s nothing legally or religiously barring an individual from entering into multiple relationships with other individuals in Kashimura or the empire. It is, however, highly frowned upon for most species as a sign of poor taste and morals, akin to public nudity or pretending to be homeless.

[The Imagination Animals]

Polygamy is illegal in Crossoveria and can be punishable by death

[Ideal Britain]

Foreign polygynous marriages were recognised from 2008.
In 2019, after a private members' bill by Defence Minister Sikandar Khan, polygynous marriages of up to three wives were legalised provided any existing wives gave written permission.
Polyandrous marriage was briefly legal with the husband's consent (with up to 2 husbands) but banned in February 2020, following evidence of a woman being forced to marry another man.
Currently polygyny is legal up to three wives but polyandry is illegal.

[Uzbekstaland]

Yes it is legal as long as it is Hetrosexual.

[Vandeg Tribe]

if man lyke 2 gurl man then he cun

butt hee nedd to let othr gurl man to felluw man

[United Communal Burrow Republics]

Polyarmory is legal at any scale with any amount of combination of participants. Most Rulzea are polyarmorous to some extent, as the humanoid nuclear family is not the societal default.

[Davao and Mati]

Legal, since 1987 after the Marriage Act of 1902 has been repealed after the Federalisation of East Mindanao

[Laka Strolistandiler]

Technically legal, but good luck evading societal consequences.

In the Queensdom, average people supervise each other’s lives with extreme precision. Having multiple sexual relationships, or even cheating on someone will lead to you being found out very soon, and then will come societal boycott. While this is not an official policy or anything, societal boycotts are essentially a measure to force an unwanted element of society away from the country. It means that the boycotted one will be refused service, fired from the job and stripped from many private social programs. Essentially, it means that you either have to work extremely hard to rebuild your reputation or leave the country. Polygamists receive such treatment on regular basis.

[Winiscia]

Polygamy is legal but seldom practiced in urban areas, being exclusively relegated to rural, mountainous areas. In this case, its polyandry that's practiced in accordance with matrilineal traditions in the form of walking marriages. Its practice that is nearly extinct, but can still be found in some very remote villages.

Individuals could potentially participate in polygyny, but this would be considered pretty unorthodox.

All that said, polyamorous relationships are not unusual and definitely not frowned upon, having roughly equal prevalence to monogamous relationships.

[Chiloshia]

Polygynous group marriage is allowed with the consent of all involved parties. A man and his wives constitute a single marriage. It is the only form of partially-same-sex union allowed. Polyandry is forbidden. This is outlined in the medieval era edict "The Code of Marriage In Settled Lands", which, upon the conquest and settlement of Chiloshia after the people's time as nomadic warriors, modified the typically looser standards on relationships into a form that would be "comfortable for women, favorable to marital loyalty, and productive for the growth of the empire's population"

[Nickel Empire]

Is polygyny legal in your nation?:
Yes.

What about polyandry?:
Yes, though not as common.

Same-sex polygamy?:
No, civil union recognition only.

Also maybe explain how your culture views polygamy and the history of it?
Polygamy has been part of the Nickelian culture since the first clans were formed. Since most clans were nomadic and there was intense inter-clan conflict there was usually more females then males. Once the clans settled and became urbanized polygamy has become relatively rare. Only 2.85% of all marriages are polygamy. There are social restrictions on how many spouses one can have. Lower class: two spouses, middle: three spouses, upper: four and royalty: five. Every marriage that becomes polygamous has to name a prime spouse: where only one person is married to the others as group marriages, like polyfidelity are illegal. Polyandry is 98% concentrated amongst the royalty due to the power and wealth royal females have. Before a marriage becomes polygamous all the other spouses have to agree and the prime spouse has to be able to prove that they can manage an extra spouse.

[Peoples National Workers Union]

Only allowed for Muslims , same sex

[The Carenian Martian Authority]

In the early days of Martian colonization when communities were far smaller & more tight-knit, polygamy was strictly forbidden in order to ensure the genetic diversity of the early population. Though massive waves of immigration have rendered fears over genetic diversity & inbreeding archaic, the ban remains in-place for purposes of social control as married men are predisposed to far lower rates of violent crime & terrorism as opposed to their bachelor counterparts. However, recent advancements within the robotic sexual entertainment industry allowing for near-lifelike humanoid toys, as well as the ability to infinitely reproduce in vitro without needing a father or mother, have rendered polygamy (aside from social/financial reasons) obsolete anyways

[Lorevellia]

Polygamy is legal because the Government doesent care about what you do in private

[Hallowed Brazilian Empire]

Polygamy is illegal. Our marriage laws are based on Renovationist Theology. According to the Renovationist Church, the state church of Brazil, "marriage is only between two people, a man and a woman, just like the first marriage in history: the one between Adam and Eve. Marriage is one of the pillars of humanity, and altering it to fit the perversions of a few is to hurt the marvelous work of God. Just like other creations by God, marriage is perfect as it is and should not be altered to conform to the eccentricities of wicked men and women."

[Madrinpoor]

There are no laws against polygamy, but there are no laws legalizing it. So unions are just civil unions, not marriages officially. Many are in support of polygamous union legalization, because with it only being a civil union and not a marriage, people can't claim insurance benefits, bank accounts, shared credit cards, etc.

[Girls Cuddling Incels]

Polyandry and polygyny are legal and recognized. Polyandry is culturally encouraged.

[Kergstan]

Polygamy isn’t de iure illegal in Kergstan given that marriage as an institution is not recognised in the country but despite that a previous ruling of the Supreme Court on the formation of a patriarchal setup where a man acts as authoritative head of an alternate society with familial characteristics has created a precedent for not allowing polygamic relations if some specific characteristics are present within the relationship.

On an other note the practice of polygamy although that might rarely happen but it may still induce authorities to believe that a family is indeed extensively religious and might be surveilled to make sure they’re not promoting religion.

Many indigenous people are exempt from such laws and rulings as polygamy forms part of their inalienable cultural heritage.

[Wochaystein]

Is polygyny legal in your nation? No
What about polyandry? No
same-sex polygamy? No
Also maybe explain how your culture views polygamy and the history of it? Polygamy is contrary to the universal Christian faith, and as such, Wochaytein forbids it. However, they has developed its own unique way of dealing with the old Zuidrian practice polygyny, and uses the laws of the land to handle it. Most diereses of Diarcesia do not have laws against same-sex polygamy However, in Wochaystein, such relationships are illegal, and sometimes even publicly criticized.

[Philosocom]

The Main Website and its Backlink Outposts care not for your marital status, nor will discriminate you because of it, nor will perform marital ceremonies to its readers and members. No official statement from Mr. Rubinshtein has been released thus far regarding his thoughts on the subject of polygamy versus 1 partner marriage.