
Common-law marriage in Colorado is a legally recognised union between two individuals without the need for a marriage license, ceremony, or paperwork. This means that couples can be considered legally married under common law even if they have not gone through the traditional marriage process. However, there is no established time limit for common-law marriage, and couples must meet specific criteria to be considered legally married. To prove a common-law marriage, couples must demonstrate cohabitation, a mutual agreement to be married, and the public assumption of a marital relationship.
| Characteristics | Values |
|---|---|
| Recognition | Common-law marriages are recognised in Colorado, but not in all US states. |
| History | Common-law marriages have been recognised in Colorado since the 1800s. |
| Requirements | Couples must meet several criteria to be considered married under common law in Colorado, including being at least 18 years old, cohabiting, and holding themselves out as married to others. |
| Evidence | Evidence of common-law marriage can include cohabitation, joint financial accounts or assets, shared bills or expenses, and witness testimony. |
| Rights and responsibilities | Couples in a common-law marriage in Colorado have the same rights and responsibilities as couples who go through a formal marriage process, including property rights, inheritance rights, and spousal support obligations. |
| Dissolution | Common-law marriages can be difficult to dissolve, and couples may need assistance from a divorce attorney to navigate the process. |
| Same-sex marriages | Colorado recognises same-sex common-law marriages, even if the marriage pre-dates the legalization of same-sex marriages in 2015. |
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What You'll Learn

Common-law marriage recognition in Colorado
Common-law marriage recognition has existed in Colorado since the 1800s. It is one of only ten US jurisdictions that continue to allow the formation of common-law marriages. The other nine are Iowa, Kansas, Montana, New Hampshire, Oklahoma, Rhode Island, Utah, Texas, and the District of Columbia.
In Colorado, a common-law marriage is a legal union between two individuals who meet specific criteria without obtaining a marriage license or participating in a marriage ceremony. Both parties must be at least 18 years old and capable of entering into a legal contract. They must mutually agree to enter into a marriage and hold themselves out as married to others. This can include using the same last name, referring to each other as spouses, or filing joint tax returns.
The Colorado Supreme Court case, In Re Hogsett (2021), outlined some indicators of a common-law marriage. These include cohabitation, joint financial accounts or assets, shared bills or expenses, and witness testimony from friends or family members who can attest to the relationship. Mail and bills addressed to each partner should list the same address to demonstrate shared residence. Lease agreements, property deeds, tax returns, and insurance forms can also be used as evidence. Even greeting cards can help establish a common-law marriage, especially if one partner refers to the other as their spouse.
Couples in a common-law marriage in Colorado are granted the same rights and responsibilities as couples who go through a formal marriage process. This includes property rights, inheritance rights, and spousal support obligations. If the relationship ends, they will have to go through the same divorce process as any other married couple in Colorado, including dividing assets and property.
It is important to note that not all states recognize common-law marriages, so it is crucial to understand the specific laws in Colorado and other states. Consulting with an experienced family lawyer can help individuals understand their rights and obligations within a common-law marriage.
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Qualifying factors for common-law marriage
In Colorado, common-law marriage, also known as a common-law union or marriage without formalities, is
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Same-sex common-law marriages
Common-law marriages have been recognised in Colorado since the 1800s. In 1877, the US Supreme Court recognised the validity of marriages contracted by present assent unless a state explicitly forbade such marriages by statute. Common-law marriages do not require the couple to have registered their relationship as a marriage with the state. However, common-law couples are considered legally married and are entitled to all the rights, privileges, and responsibilities of a legal and binding marriage.
Colorado is one of a small number of states that recognises common-law marriages. These include Iowa, Kansas, Montana, New Hampshire, Oklahoma, Rhode Island, Utah, Texas, and the District of Columbia.
In the context of same-sex marriages, Colorado has had a complex history. In 1996, the Colorado General Assembly passed a bill banning same-sex marriage, but it was vetoed by Governor Roy Romer. This occurred again in 1997. However, in 2000, Governor Bill Owens signed a bill banning same-sex marriage into law. Despite this, civil unions have been legal in Colorado since 1 May 2013, providing rights comparable to those enjoyed by married couples.
In 2015, same-sex marriages were officially legalized in Colorado, and the conduct which results in a finding of a marriage can pre-date this legalization. This means that if an LGBTQ+ couple intended to enter into a marital relationship prior to 2015, the court will still treat the marriage as valid.
In 2021, the Colorado Supreme Court revisited the traditional requirements for common-law marriage and found them to be outdated, especially in the context of same-sex couples. The court ruled that same-sex couples must be allowed to enter into common-law marriages, and the state must retroactively recognize common-law marriages of same-sex couples that occurred prior to the legalization of same-sex marriage. This decision was based on the understanding that same-sex couples may not have been fully open about their relationships due to fears of discrimination and that traditional indicators of marriage may no longer be exclusive to marital relationships.
In 2024, voters repealed the state's constitutional ban on same-sex marriages by a significant margin, and statutes were updated to reflect the legalization of same-sex marriage in 2025. This repeal removed all provisions restricting marriage to "one man and one woman", solidifying the recognition of same-sex common-law marriages in Colorado.
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Legal rights and responsibilities
Common-law marriage in Colorado is a legally recognised union between two individuals who meet specific criteria without obtaining a marriage license or participating in a marriage ceremony. Couples in a common-law marriage have the same rights and responsibilities as those who go through the formal marriage process, including property rights, inheritance rights, and spousal support obligations.
To establish a common-law marriage in Colorado, several criteria must be met. Firstly, both parties must be at least 18 years old and legally capable of entering into a contract. Secondly, there must be a mutual agreement to enter into a marital relationship, which can be demonstrated by presenting themselves as a married couple to their community. This may include using the same last name, referring to each other as spouses, filing joint tax returns, or sharing finances and property ownership.
The determination of a common-law marriage can be complex, and it is not solely based on the duration of cohabitation. The Colorado Supreme Court has clarified that modern common-law marriages may not adhere to traditional norms and indicators. For example, in the 2021 case of In Re Hogsett, the court dismissed the argument that an individual did not intend to enter into a same-sex common-law marriage and, therefore, did not consider the legal consequences. The court emphasised that the focus is on the intention to enter into a marital relationship, regardless of the understanding of the legal implications.
If a common-law marriage is established and recognised by the courts, the couple becomes subject to the divorce laws of Colorado. This includes the division of assets, property, alimony, and child support. It is important to note that without an official record of the marriage date, determining the timeline for dividing marital property can be challenging and may require legal assistance.
To summarise, couples in a common-law marriage in Colorado have the same legal rights and responsibilities as those in a formal marriage. However, understanding and proving a common-law marriage can be complex, and it is advisable to consult with an experienced family lawyer to navigate the specific circumstances and protect one's rights.
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Proving a common-law marriage
Common-law marriage in Colorado is a way for couples to enter into a marriage without a ceremony or marriage license. It has been recognized in the state since the 1800s.
To prove a common-law marriage in Colorado, the following must be demonstrated:
- Cohabitation: The couple must live together, but there is no specific duration required.
- Agreement to be married: Both parties must consent or agree to be married. This is considered the first requirement of a common-law marriage.
- Holding out as married: The couple must act like a married couple, such as by referring to each other as husband and wife in public and on documents.
While cohabitation is a factor, simply living together for a period of time does not create a common-law marriage. The intention to be married is crucial. Same-sex couples can also establish common-law marriages in Colorado, even if their relationship began before same-sex marriage was legalized.
When determining the existence of a common-law marriage, courts will consider various types of evidence, including:
- Joint tax returns: Filing taxes jointly may indicate a common-law marriage.
- Affidavit: While not required, a signed and notarized affidavit attesting to the marriage can be filed with the County Clerk and Recorder. However, an affidavit alone may not be sufficient proof for a court.
- Joint accounts: Maintaining joint checking or savings accounts can be considered evidence of a common-law marriage.
- Registration as a married couple: Being registered as husband and wife on applications, leases, contracts, or registers can support a claim of common-law marriage.
- Name changes: A woman taking the man's last name can be considered evidence of a common-law marriage.
It is important to note that there is no single piece of evidence that will prove or disprove a common-law marriage. The court will consider all the evidence together to make a determination.
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Frequently asked questions
Common-law marriage is a legally recognised form of marriage in Colorado, where two individuals meet specific criteria without obtaining a formal marriage license or going through a ceremony.
Both parties must be at least 18 years old, legally free to marry, and must cohabitate. They must mutually agree to be married and hold themselves out to be married in public. This can include referring to each other as spouses, using the same last name, and filing joint tax returns.
There is no specific time requirement for cohabitation, but the couple must live together long enough to demonstrate a marital-like relationship.
Evidence of cohabitation, joint financial accounts, shared property ownership, lease agreements, insurance forms, and witness testimony can all be used to prove a common-law marriage.
Yes, same-sex couples can enter into common-law marriages in Colorado, provided they meet the state's requirements.








































