Does Colorado have common law marriage? Yes, it does. Colorado is one of only a handful of states in the U.S. that still legally recognize common law marriage. If you live in Colorado and have been building a life with your partner without a formal ceremony, you may already have legal marital rights and obligations without knowing it.
Is Common Law Marriage Legal in Colorado?
Yes. Colorado actively recognizes common law marriage under state law. Unlike California and many other states that abolished the practice, Colorado treats a valid common law marriage with the same legal weight as a formally licensed marriage.
This means common law spouses in Colorado can access spousal benefits, inherit property, and file joint tax returns.
What Are the Requirements for Common Law Marriage in Colorado?
Colorado does not require a couple to live together for a specific number of years. The popular belief that cohabiting for seven years creates a legal marriage is a myth. Instead, Colorado courts look at the totality of the circumstances. The key requirements include:
- Both partners must be at least 18 years old
- Both partners must be legally free to marry (not already married to someone else)
- Both partners must mutually agree to be in a marital relationship
- The couple must present themselves publicly as married
How to Prove Common Law Marriage in Colorado
Because there is no marriage license involved, proving a common law marriage in Colorado requires documentation. Courts commonly look at evidence such as joint bank accounts, shared leases or mortgage agreements, joint tax filings using married filing status, a Colorado common law marriage affidavit signed by both partners, and consistent use of the same last name.
Common Law Marriage Rights in Colorado
Once a common law marriage is established, both partners hold the same legal rights as any formally married couple in Colorado. These rights include property division, spousal inheritance, access to health insurance benefits through a partner’s employer, and the right to make medical decisions for an incapacitated spouse.
Colorado courts have also confirmed that common law marriage applies equally to same-sex couples, ensuring that all qualifying couples in the state have access to the same protections.
Civil Union vs Common Law Marriage in Colorado
Colorado also offers civil unions as a legal alternative. A civil union requires formal registration with the state, while a common law marriage is based on mutual agreement and public conduct.
Both provide legal protections, but a common law marriage can arise unintentionally, which is why many Colorado residents are surprised to learn they may already qualify.
How to End a Common Law Marriage in Colorado
Since Colorado recognizes common law marriage as a full legal marriage, ending one requires a formal divorce process through the Colorado court system. There is no informal way to dissolve it.
Couples must divide property, address spousal support, and if applicable, settle child custody matters, just like any other divorce in Colorado.
If you believe you may be in a common law marriage in Colorado, consult a licensed Colorado family law attorney to understand your rights and obligations in 2026.