In this article, you’ll learn:
- Whether Arizona recognizes common law marriage
- What happens if you had a common law marriage in another state
- Whether living together creates marriage rights in Arizona
- What rights unmarried couples may have
- How a cohabitation agreement can help
- When to speak with an Arizona family law attorney
Many couples live together for years, share expenses, raise children, or build property together without getting legally married. Because of that, people often wonder whether Arizona recognizes common law marriage.
In most cases, Arizona does not allow couples to create a new common law marriage simply by living together or presenting themselves as married. However, Arizona may recognize a common law marriage that was validly created in another state or jurisdiction.
Understanding the difference matters. Marriage can affect divorce, property rights, spousal maintenance, inheritance, benefits, and other legal issues. For unmarried couples in Arizona, a cohabitation agreement may help clarify financial responsibilities and protect both partners.
What Is Common Law Marriage?
Common law marriage is a type of legally recognized marriage that may be created without a formal wedding ceremony or marriage license in certain states or jurisdictions. The requirements vary by location, but common law marriage usually involves more than simply living together.
Depending on the state, a couple may need to show that they intended to be married, lived together, held themselves out as married, and met any other legal requirements of that jurisdiction.
Arizona is different. Couples in Arizona do not become legally married simply because they live together, share finances, use the same last name, or refer to each other as spouses.
Does Arizona Recognize Common Law Marriage?
Arizona does not generally recognize common law marriage created within the state.
This means a couple does not become legally married in Arizona just because they live together, share expenses, have children together, file documents together, or introduce each other as spouses.
Arizona law generally requires a marriage license and a marriage ceremony for a marriage to be created in Arizona.
A couple must obtain a marriage license and participate in a ceremony conducted by someone authorized to solemnize marriages.
However, Arizona may recognize a common law marriage if it was validly established in a state, country, or jurisdiction where common law marriage is legally allowed.
This issue can become important when a couple moves to Arizona and later separates, disputes property, or needs to determine whether a legal marriage exists.
What if You Had a Common Law Marriage in Another State?
If a couple formed a valid common law marriage in another state before moving to Arizona, the marriage may need to be addressed through Arizona family court. This can affect divorce, property division, debt division, spousal maintenance, and other legal rights.
The key question is whether the relationship met the legal requirements of the state or jurisdiction where the common law marriage allegedly began. Because each state has different rules, couples should not assume Arizona will automatically treat the relationship as a marriage without reviewing the facts.
For example, if a couple lived in a state that allows common law marriage and met that state’s requirements before moving to Arizona, Arizona may recognize the marriage for family law purposes. If the relationship does not meet the requirements of the other state, the couple may not have the same rights as married spouses in Arizona.
If there is a disagreement about whether a common law marriage exists, an Arizona family law attorney can review the history of the relationship, where the couple lived, how they represented themselves, and what legal rights may apply.
How Long Do You Have to Live Together to Be Common Law Married in Arizona?
There is no number of years that creates a common law marriage in Arizona. A couple can live together for five, ten, or even twenty years without becoming legally married under Arizona law.
This is one of the most common misconceptions about common law marriage. Time together may matter in a state that allows common law marriage, but in Arizona, cohabitation alone does not create a legal marriage.
Living together can still create practical and legal questions, especially if the couple shares property, debt, children, businesses, bank accounts, or household expenses. Those issues may need to be addressed through contracts, property law, parenting matters, or other legal tools rather than divorce.
Do Unmarried Couples Have Property Rights in Arizona?
Unmarried couples do not automatically receive the same property rights as married spouses in Arizona. If an unmarried couple buys property together, shares bank accounts, pays bills together, or separates after a long relationship, the outcome may depend on title, contracts, written agreements, financial records, and other evidence.
This is one reason cohabitation agreements can be useful. A written agreement can help unmarried partners clarify who owns what, how expenses are handled, what happens if the relationship ends, and how shared assets or debts should be managed.
For married couples, property division is often addressed through the divorce process. For unmarried couples, disputes over shared property may not follow the same family court path. If you are unsure whether a relationship creates marriage rights or property rights, it is important to get legal guidance before signing documents, moving out, selling property, or making major financial decisions.
What Is a Cohabitation Agreement?
A cohabitation agreement is a legal agreement between unmarried partners. It can outline each person’s rights and responsibilities during the relationship and explain what should happen if the relationship ends.
A cohabitation agreement may address:
- Ownership of real estate or personal property
- Shared bills and household expenses
- Bank accounts and financial responsibilities
- Debt obligations
- Business interests
- Pets
- What happens if the couple separates
- How disputes will be handled
A cohabitation agreement cannot replace every legal right that comes with marriage, but it can help reduce confusion and protect both partners. For couples who do not plan to marry, or who are unsure whether marriage is the right step, a cohabitation agreement can provide clarity before a dispute arises.
The Valley Law Group helps Arizona couples with marital agreements, including agreements that may help clarify financial expectations, property ownership, and responsibilities between partners.
Common Law Marriage vs. Cohabitation Agreement
Common law marriage and cohabitation agreements are not the same thing. A common law marriage, when valid, may create a legal marriage. A cohabitation agreement does not make a couple married. Instead, it helps unmarried partners define their rights and responsibilities by contract.
For Arizona couples, this distinction is important. If Arizona does not recognize the relationship as a legal marriage, a cohabitation agreement may be one of the clearest ways to document expectations and reduce future disputes.
A cohabitation agreement may be especially helpful when unmarried partners:
- Buy a home together
- Share significant expenses
- Own a business together
- Have unequal financial contributions
- Share debts
- Want to protect separate property
- Want a plan if the relationship ends
Can Unmarried Parents Still Have Custody or Child Support Rights?
Yes. Marriage is not required for parents to have rights and responsibilities involving their children. Unmarried parents may still need to address legal decision-making, parenting time, child support, and related family law issues.
If unmarried parents separate, they may need a court order that explains each parent’s rights and responsibilities. This can include where the child lives, how parenting time is scheduled, who makes major decisions, and how child support is calculated.
Unmarried parents can learn more about these issues through The Valley Law Group’s child custody and child support resources.
Attorney Insight
Many unmarried couples assume that time together creates the same rights as marriage, but Arizona generally does not treat cohabitation the same way. If you own property together, share finances, have children together, or moved to Arizona after forming a common law marriage elsewhere, it is worth speaking with an attorney before a dispute arises.
When to Talk to an Arizona Family Law Attorney
You may want to speak with an Arizona family law attorney if:
- You believe you had a valid common law marriage in another state
- You moved to Arizona after living as common law spouses elsewhere
- You and your partner are separating after years of living together
- You own property with an unmarried partner
- You share debts, businesses, or major expenses
- You need a cohabitation agreement
- You have children with an unmarried partner
- You are unsure whether divorce, property law, or another legal process applies
A lawyer can help determine whether Arizona may recognize a marriage, whether a cohabitation agreement is appropriate, and what legal options may be available.
Common Law Marriage in Arizona FAQs
How The Valley Law Group Can Help
Questions about common law marriage, cohabitation agreements, or unmarried partner rights can become complicated quickly.
The answer may depend on where the relationship began, whether another state’s laws apply, whether property or children are involved, and whether there are written agreements between the partners.
The Valley Law Group can help you understand your options and determine the best next step.
Our Arizona family law team assists with marital agreements, cohabitation agreements, divorce-related questions, child custody, child support, and other family law concerns.
If you are unsure whether you are legally married, need help protecting your rights as an unmarried partner, or want to create a cohabitation agreement, contact The Valley Law Group today to schedule a consultation.
Editor’s Note:
This article was originally published on February 12, 2024, and has been updated on October 19, 2026, to provide clearer guidance on common law marriage in Arizona, out-of-state common law marriages, cohabitation agreements, and legal options for unmarried couples.
Sources:
All sources accessed October 12, 2026.
- Arizona Courts. (n.d.). Guide to court customer assistance: Legal advice and legal information. https://www.azcourts.gov/Portals/0/0/admcode/GUIDE%20TO%20COURT%20CUSTOMER%20ASSISTANCE%20-%20Legal%20Advice%20-%20Legal%20Info.pdf
- Arizona Health Care Cost Containment System. (n.d.). 520 Legal marriage. https://epm.azahcccs.gov/epmplus/Policy/Chapter_500_Non-Financial_Conditions_of_Eligibility/520_Legal_Marriage.htm
- Arizona State Legislature. (n.d.). A.R.S. § 25-112: Marriages contracted in another state; validity and effect. https://www.azleg.gov/ars/25/00112.htm
- Arizona State Legislature. (n.d.). A.R.S. § 25-121: Marriage license; application; affidavit. https://www.azleg.gov/ars/25/00121.htm
- Arizona State Legislature. (n.d.). A.R.S. § 25-125: Marriage ceremony; official; witnesses; marriage license; covenant marriages. https://www.azleg.gov/ars/25/00125.htm
- Social Security Administration. (2023, May 30). State laws on validity of common-law non-ceremonial marriages. https://secure.ssa.gov/apps10/poms.nsf/lnx/0200305075
Jonathan Roeder is a founding partner of The Valley Law Group and an Arizona attorney focused on family law, criminal defense, and personal injury. Jonathan has built his practice around helping clients navigate difficult legal issues with clear guidance, practical strategy, and strong advocacy. As an attorney, business owner, and Father of three, he understands the importance of preparation, communication, and helping clients make informed decisions during stressful and uncertain times. Jonathan’s career reflects both professional recognition and a commitment to developing others in the legal field. He has earned numerous legal honors, including recognition as a Super Lawyers Rising Star and a 10.0 “Superb” rating on Avvo, while also mentoring legal students and young attorneys through his work as a college faculty member and leader in his industry.