While often confused with polyamory or other forms of non-monogamy, Polygamy is specifically defined by marriage. Traditionally it is rooted in cultural, religious, or legal frameworks rather than personal life philosophies.
In most Western and industrialization Polygamy is consider a crime, and is often called "bigamy." The penalty for this varies by location from an infraction level offense, to a misdemeanor, to even a felony with up to 5 years in prison.
Gyny vs Andry
There are two main types of Polygamy: one man having multiple wives (polygyny), and one woman having multiple husbands (polyandry).Polygamy practices
In some areas of the world, Polygamy is practiced and even accepted as a religious or cultural practice.- Sub-Saharan Africa has the highest prevalence of Polygamy in the world, with roughly 11% of the population living in a plural marriage. To break this area down a bit further, the highest rate of polygamous households by country in this area are: Burkina Faso (36%), Mali (34%), Gambia (30%), Niger (29%), and Nigeria (28%). Source
- Across the Middle East and North Africa, polygamy is recognized under Islamic law. This includes areas like Saudi Arabia, the UAE, Qatar, Oman, Kuwait, Yemen, Iraq, and Egypt.
- Asian countries such as India, Singapore, Malaysia, Philippines, and Indonesia allow for polygamy based on a person's registered religious faith. In Tibet and the Himalayas, informal polyandry is considered a cultural norm. Source
- There are pockets of polygamists throughout North America, despite it being classified as criminal bigamy.
- In some indigenous communities across the world, informal polygamous unions are sometimes recognized as part of preserved customary traditions.
More information:
Polygamy is rare around the world
Marriage Laws
Most polyamorous people view current marriage laws as restrictive, outdated, and fundamentally structured with monogamous bias, and often navigate marriage laws through a mix of activism, legal workarounds, and philosophical rejection.Activists often focus on expanding civil and municipal relationship laws to cover multi-partner structures. In 2020, Utah became the first state to effectively decriminalize polygamy among consenting adults, and shifted it from a felony to a minor infraction. In early 2020s, some ordinances on the city level in Massachusetts passed to allow domestic partnership to include 3 or more people.
Some polyamorous groups have found a legal work around by actively using corporate, estate, and contract laws to protect their families. Using an LLC for shared property allows for polyamorous structures to purchase a house together and ensure everyone has equal equity and inheritance rights. Using extensive power-of-attorney and medical proxy documents allows hospital visitation and decision-making rights in medical situations without concern for legal marriage. In some jurisdictions, courts are begining to recognize tri-parenting agreements in family court, allowing 3 adults to be listed as legal guardians on birth certificates or custody arrangements (DG v KS in New Jersey 2016, DM vs MM vs AG in New York 2017, and the Quebec Three Dad Adoption Challenge, 2025).
For others, distancing modern polyamory from traditional polygamy laws stems from the fear of overlapping with typical polygamy stigmas of patriarchy and structural inequality. Because of this, many advocates emphasize the desire for legal recognition is rooted in egalitarianism, fluid gender dynamics, and individual autonomy. However, this fear of overlap has caused a divide of the polyamory community, with some wanting marriage equality, and others wanting to abolish marriage laws all together and separate legal rights from romantic relationships entirely.
Some key legal rights polyamorous families lose without marriage equality:
- immigration and immigration sponsorship
- tax liabilities such as no joint filing, "gift tax," asset mixing, or inheritance tax penalties
- healthcare, medical, and end-of-life rights
- property division
More Information:
Unmarried Couples & Their Legal Rights
Poly Families Project
Diana Adams: Creating a safe future for all families, regardless of biological or legal relationship
Somerville Passes Historic Non-Discrimination Ordinance Protecting Polyamorous Families and Other Diverse Relationships
Berkeley and Oakland Introduce Historic Nondiscrimination Bills Protecting Diverse Family and Relationship Structures
New leave policies allow LGBTQIA+ folks to care for chosen family
Is Polyamory Illegal? Plural Marriage and Multi-Partner Relationship Laws
Reflection
- What is my view on marriage as a contract? Do I believe the state or a religious institution should have a say in validating multi-partner relationships? Do I believe commitment should exist entirely outside of institutional laws?
- How do I feel about gender asymmetry in a plural marriage or relationship?
- Would I be willing to accept the legal and social risks of a plural union? With legal marriage being limited to two people in most areas, that leaves other partners as "legal strangers;" am I comfortable being left as a "legal stranger" or my partner being such? Am I comfortable navigating life without standard legal safety nets in place for my relationships?
- What changes for me emotionally if a bond is a "marriage" vs a "committed partnership?" Do I want multi-partner commitments to be recognized legally?