Are you living with your partner in Missouri and wondering whether your relationship is legally recognized as a marriage? Does Missouri have common law marriage? The short answer is no.
Missouri does not recognize common law marriage, regardless of how long you and your partner have lived together. If you are a Missouri resident relying on cohabitation alone to establish marital rights, you could be left without critical legal protections.
What Is Common Law Marriage?
Common law marriage is a legal arrangement where a couple is considered married without a formal ceremony or marriage license. States that recognize it typically require couples to live together, agree to be married, and hold themselves out to the public as a married couple.
However, only a handful of states still allow it, including Kansas, Colorado, Texas, Iowa, Montana, Utah, and New Hampshire.
Missouri is not on that list.
Is Common Law Marriage Legal in Missouri?
Missouri state law explicitly declares all common law marriages formed within the state to be null and void. No matter how many years you have lived together in Kansas City, St. Louis, Springfield, or anywhere else in Missouri, cohabitation alone does not make you legally married.
This is a common source of confusion. Many Missouri residents believe in the so-called “7-year rule,” assuming that living together for seven years automatically creates a legal marriage. That is a myth. There is no such rule in Missouri or in any U.S. state.
What If You Formed a Common Law Marriage in Another State?
Missouri does recognize common law marriages that were legally established in another state before the couple moved to Missouri. Under the Full Faith and Credit Clause of the U.S. Constitution, Missouri courts will honor a valid common law marriage formed in a qualifying state such as Colorado or Kansas.
However, Missouri will not allow you to establish a new common law marriage after relocating here.
Does Missouri Recognize Domestic Partnerships?
Missouri does not recognize domestic partnerships at the state level. A limited number of Missouri cities offer domestic partnership registration, but this varies by municipality and provides far fewer protections than legal marriage.
Legal Rights of Unmarried Couples in Missouri
Without a legal marriage, Missouri’s cohabitation law offers unmarried couples very little protection. The state does not recognize palimony claims, and there is no automatic right to divide property, receive spousal support, or inherit from a partner who dies without a will.
Missouri residents in long-term relationships should consider the following legal tools to protect themselves.
Cohabitation Agreement
A cohabitation agreement is a written contract that outlines how finances, property, and debts are handled during and after the relationship. Missouri courts are likely to enforce a properly drafted agreement.
Estate Planning Documents
Wills, trusts, and powers of attorney allow you to grant your partner rights that the law would otherwise reserve for legal spouses, including inheritance rights and the ability to make medical decisions on your behalf.
How to Get Legally Married in Missouri
If you want full legal protection as a couple in Missouri, formal marriage remains the only option. You must apply for a marriage license at your county clerk’s office, observe a three-day waiting period, and have the ceremony performed by a licensed officiant such as a judge or ordained minister.
The Bottom Line for Missouri Residents
Missouri does not recognize common law marriage formed within the state, and no amount of time living together changes that. If you and your partner share property, finances, or children, speak with a Missouri family law attorney to understand your options and protect your rights through a cohabitation agreement or formal marriage.