Most people assume adultery is just a personal problem. In Oklahoma, it’s actually a crime. That might surprise you. It surprises a lot of people.
Oklahoma still has an adultery law on the books. And it’s not a minor offense. Understanding this law could matter more than you think, especially if you’re going through a divorce.
What Is Adultery Under Oklahoma Law?
Oklahoma defines adultery in Title 21, Section 871 of its statutes. Adultery is the unlawful voluntary sexual intercourse of a married person with someone of the opposite sex. Pretty straightforward.
Here’s the part that trips people up. When the act involves only one married person, both parties are still considered guilty of adultery. So even if you’re single, you could technically be charged too. Right?
This law has been around since 1910. It’s old. Really old. But it’s still in effect as of 2026.
Is Adultery a Crime in Oklahoma?
Yes. It absolutely is. Adultery remains part of the Oklahoma Crimes Against Public Decency and Morality. It sits in the criminal code alongside other serious offenses.
Any person guilty of adultery is guilty of a Class D1 felony offense. That’s not a misdemeanor. It’s a felony.
Okay, pause. Read that again. Cheating on your spouse is technically a felony in Oklahoma. Most people have no idea.
What Are the Penalties?
Here’s where it gets serious. The penalties on paper are steep.
The penalties are surprisingly harsh. Prison time can be up to five years in the State Penitentiary. Fines can be up to $500. You could face both at the same time.
Think of it like a felony drug charge, but the crime is an affair. The prison exposure is real, even if courts almost never use it.
Adultery is a felony in Michigan, Wisconsin, and Oklahoma. You’re in rare company. Most states have either removed these laws or never had them.
Who Can File Charges?
This part is actually interesting. Not just anyone can walk into a police station and report adultery. The law limits who can start a prosecution.
Prosecution for adultery can only be initiated and pursued against either party involved by their respective spouse or by the spouse of the other party involved. So it has to come from a husband or wife.
There is one big exception. Any individual may file a complaint if the parties are cohabiting in open and notorious adultery. That means if a couple is living together publicly as if married, anyone can report it.
Wondering what “open and notorious” actually means? Good question. Simply having occasional illicit intercourse, without a public or notorious living together, is not sufficient to constitute the offense of living in a state of open and notorious adultery. The parties must reside together publicly, in the face of society, as if the conjugal relation existed between them, and their illicit intercourse must be habitual.
So a secret affair does not meet this standard. An ongoing, public relationship where the two people basically live as a couple does.
Is This Law Actually Enforced?
Honestly? Almost never.
Despite being codified, enforcement of this law has been virtually nonexistent since the 1960s. Decades have passed without meaningful prosecutions.
The law is considered “dormant” in the criminal justice system. While it remains on the books, actual enforcement is rare, and finding a recent case where it has been applied would be challenging.
A friend asked me about this recently. She thought I was joking when I said it was a felony. Then I showed her the statute. She was shocked. Most people are.
So why does it still exist? There have been various legislative attempts to repeal the adultery statute, but as of 2026, it remains part of Oklahoma law. The repeal efforts haven’t succeeded yet.
Could the Law Be Challenged in Court?
Here’s where it gets interesting. Many lawyers believe this law would not survive a court challenge.
Many legal experts believe the law would be found unconstitutional if it were ever actually prosecuted, citing U.S. Supreme Court precedents regarding private, consensual adult conduct.
The key case is Lawrence v. Texas. The Supreme Court invalidated a Texas sodomy law, ruling that it infringed upon privacy rights due to the consensual nature of the sexual conduct occurring within a private residence. The court determined that such consensual contact within one’s home does not present a legitimate victim, thus violating the right to privacy.
That ruling is why most legal experts say Oklahoma’s adultery law would fall if tested. But because it’s never prosecuted, it just sits there.
How Does Adultery Affect Divorce in Oklahoma?
Stay with me here. This is where the law actually has real-world impact.
Adultery is one of twelve statutory grounds for divorce in Oklahoma under 43 O.S. § 101. You can use it as the reason for your divorce filing.
That said, most divorces in Oklahoma are filed on no-fault grounds, citing incompatibility or irreconcilable differences. Choosing to file on fault-based grounds, such as adultery, may have limited practical benefits.
Wondering why someone would file on fault grounds then? Good question. Sometimes it’s used as leverage in negotiations. Because the law exists, it is occasionally used as leverage during contentious divorce negotiations.
Does Adultery Affect Alimony?
This one surprises people too. The answer is: sometimes, but usually not much.
Oklahoma courts award spousal support under 43 O.S. § 121 based on financial need and the paying spouse’s ability to pay. Marital misconduct, including adultery, is generally not a relevant consideration. Oklahoma courts have consistently held that alimony should never be used to punish a spouse for misdeeds.
However, there are exceptions. A court may reduce alimony to a spouse who committed adultery or increase alimony to the innocent spouse, depending on the overall circumstances of the case.
The key question a judge asks is whether the affair caused direct financial harm. Adultery may become relevant to alimony when the affair caused direct financial harm to the supporting spouse, such as dissipation of assets that reduced their post-divorce financial position.
What About Marital Property Division?
Oklahoma divides marital property using equitable distribution. That means fair, not necessarily 50/50.
While adultery itself does not automatically affect property division, it can come into play if the adulterous spouse used marital assets to fund the affair. For example, if a spouse spent significant marital funds on gifts, vacations, or housing for a lover, the court may consider this dissipation of assets and adjust the property settlement accordingly to compensate the non-adulterous spouse.
So the affair itself may not hurt your property settlement. But spending joint money on the affair? That’s a different story. Courts take that seriously.
Does Adultery Affect Child Custody?
Many people assume infidelity makes someone a bad parent. Courts don’t automatically agree.
Oklahoma courts make child custody decisions based solely on the best interests of the child under 43 O.S. § 109, and a parent’s adultery generally does not affect custody or visitation rights. The statute explicitly provides that courts shall not consider conduct of a proposed custodian that does not affect the relationship to the child. Adultery by itself does not make a parent unfit or disqualify them from custody consideration.
Personally, I think that’s a sensible rule. A parent’s romantic life and their parenting ability are usually separate things.
Special Circumstances: What Counts as Evidence?
If adultery is going to matter in your divorce case, you need more than suspicion. You need real proof.
Oklahoma requires evidence establishing both opportunity and inclination to commit adultery. Effective evidence includes text messages or emails with the affair partner, hotel receipts or travel records, financial transfers to the affair partner, and photos.
Just a feeling that your spouse was cheating will not hold up in family court. You need documentation. A family law attorney can help you understand what evidence is actually useful and how to gather it legally.
How to Handle an Adultery Situation in Oklahoma
Not sure what to do next? Here are your practical options.
If you believe your spouse committed adultery and want it to matter in your divorce, talk to a family law attorney first. They can tell you whether filing on fault grounds actually helps your case. Sometimes it does. Often it doesn’t.
If you want to file criminal charges, you need to know that almost no district attorney will pursue this. You can file a complaint, but prosecution is extremely unlikely. Most attorneys will tell you not to bother.
If someone is openly living with your spouse as a couple, that is technically the stronger case legally. But even then, criminal prosecution is nearly unheard of.
The most practical use of this law today is in divorce negotiations. The existence of the felony statute creates pressure. Some spouses use that pressure to reach better settlement terms.
Frequently Asked Questions
Is adultery a felony or misdemeanor in Oklahoma?
It is a felony. Specifically, a Class D1 felony under Oklahoma Statute 21-872. The possible penalties include up to five years in prison and a fine of up to $500.
Can you actually go to jail for adultery in Oklahoma?
Technically yes, but practically no. The law has not been meaningfully enforced since the 1960s. No district attorney is going to take this case to trial in 2026.
Does it matter if only one person is married?
No. If only one person in the relationship is married, both people can still be charged. The unmarried person is equally guilty under Oklahoma law.
Can adultery get you more money in a divorce?
Maybe, but don’t count on it. Courts rarely use adultery to increase alimony. It can matter if the affair caused direct financial harm, like marital money being spent on a lover.
Who can report adultery to police in Oklahoma?
Only a spouse of either person involved can bring most charges. However, if two people are openly living together as if married, any person can file a complaint.
Does cheating affect who gets the kids?
Generally no. Oklahoma judges focus on what’s best for the child, not on a parent’s personal life. Adultery alone does not make someone an unfit parent.
Could this law be repealed soon?
It’s possible. Lawmakers have tried to repeal it before. As of 2026, it still stands. Keep an eye on Oklahoma legislative sessions if this matters to you.
Final Thoughts
Now you know the real story. Oklahoma’s adultery law is technically a felony. It carries serious penalties on paper. But it’s almost never enforced in real life.
Where it does matter is in divorce court. An affair can sometimes affect alimony, definitely affect property division if marital money was spent, and occasionally serve as leverage in settlement talks.
The bottom line: if you’re dealing with infidelity and considering your legal options, talk to an Oklahoma family law attorney. The law is complicated, the rules are specific, and the right move depends entirely on your situation.
Stay informed, know your rights, and when in doubt, get legal advice from someone who practices in your state.
References
- Oklahoma Statute 21-871: Adultery Defined
- Oklahoma Statute 21-872: Punishment for Adultery
- Does Adultery Affect Divorce in Oklahoma? (Divorce.law, April 2026)
- Adultery Is a Criminal Offense in Oklahoma (Claremore Attorneys, January 2026)
- How Marital Misconduct Affects Oklahoma Alimony (Wirth Law Office, April 2026)
