The age of consent is the minimum age at which a person can legally agree to sexual activity, and in the United States it ranges from 16 to 18 depending on the state. Thirty-four states set it at 16, six states set it at 17, and eleven set it at 18.1U.S. Department of Health and Human Services. Statutory Rape: A Guide to State Laws and Reporting Requirements Federal law sets its own threshold of 16 on land under federal jurisdiction, but treats anyone under 18 as a minor for purposes of interstate travel and sexually explicit imagery.2Office of the Law Revision Counsel. 18 USC 2243 – Sexual Abuse of a Minor, a Ward, or an Individual in Federal Custody That gap between state and federal rules is where most people get into trouble.
What the Age of Consent Actually Means
Below the age of consent, sexual contact is a crime no matter what the younger person said, did, or wanted. The law replaces any argument about maturity with an objective cutoff. A minor who initiates, agrees to, or actively seeks out sexual activity still cannot legally consent to it, and the older participant bears the criminal responsibility.
This is separate from the age of majority, which is 18 nearly everywhere in the U.S. for things like signing contracts, voting, and jury service. A 16-year-old in a state with a 16-year-old consent threshold can legally agree to sexual activity but cannot sign a binding lease. The two thresholds do different work and should not be confused.
How the Age Varies by State
No single federal statute sets the age of consent for the country. Each state writes its own rule into its criminal code, and those rules fall into three groups: 16 in 34 states, 17 in six, and 18 in eleven.1U.S. Department of Health and Human Services. Statutory Rape: A Guide to State Laws and Reporting Requirements Conduct that is legal in one state can be a felony a short drive across the border.
The label attached to the offense also varies. Some states call it statutory rape, others use sexual assault, unlawful sexual contact, or corruption of a minor. The premise is the same: a person under the threshold is legally incapable of consenting, and the older participant is criminally liable. Because states revise these thresholds and penalty structures periodically, anyone unsure of the current rule should check their state’s criminal code rather than rely on assumptions.
Federal Age of Consent
The federal age of consent is 16, and it governs conduct on military bases, in federal prisons, in national parks, and on other federal land. Under 18 U.S.C. § 2243, it is a federal crime to engage in a sexual act with someone at least 12 but under 16 when the older person is at least four years older, punishable by up to 15 years in federal prison.2Office of the Law Revision Counsel. 18 USC 2243 – Sexual Abuse of a Minor, a Ward, or an Individual in Federal Custody
A separate statute takes over the moment state lines are crossed. Under 18 U.S.C. § 2423, transporting a person under 18 across state or international borders for sexual activity that violates any law carries a mandatory minimum of 10 years and a maximum of life. Traveling interstate with intent to engage in illicit sexual conduct with a minor is punishable by up to 30 years.3Office of the Law Revision Counsel. 18 USC 2423 – Transportation of Minors The federal cutoff here is 18, not 16, and it applies even if the sexual activity would have been legal in both the origin and destination states. That last point catches people off guard: an age-gap relationship that is fully lawful at home can become a federal case the moment travel is involved.
Close-in-Age Exemptions
Most states recognize that a strict rule applied to teenagers dating each other produces absurd outcomes, like felony charges against a 17-year-old for a relationship with a 15-year-old. Close-in-age provisions, often called Romeo and Juliet laws, carve out exceptions. Details differ, but the typical structure requires the younger person to be above a minimum floor (often 13 or 14) and the older person to be no more than three to five years older.
These exemptions do not legalize every teenage encounter. They apply only when the activity was genuinely consensual, involved no coercion or force, and fell within the specific age gap the state allows. Step outside any of those limits and the full statute applies.
Effect on Sex Offender Registration
One of the most consequential effects of close-in-age laws is on sex offender registration. Federal law under the Sex Offender Registration and Notification Act (SORNA) excludes consensual sexual conduct from its definition of a sex offense when the victim was at least 13 and the offender was no more than four years older.4Office of the Law Revision Counsel. 34 USC 20911 – Relevant Definitions, Including Amie Zyla Expansion of Sex Offense Definition Many states follow a similar approach, either exempting qualifying individuals automatically or allowing them to petition a court for removal. Without these carve-outs, a teenager convicted of a technical age-of-consent violation could end up on a public registry alongside people convicted of violent offenses.
When Consent Is Invalid Even Above the Age Threshold
Passing the statutory age does not make all sexual contact lawful. Several situations void consent even between adults.
Positions of Authority
Many states criminalize sexual contact between an authority figure and a person under their supervision even if that person is above the general age of consent. Common examples include teachers with students, coaches with athletes, correctional officers with inmates, and therapists with clients. Federal law addresses a narrower version: 18 U.S.C. § 2243(b) makes it a crime, punishable by up to 15 years, for anyone with custodial, supervisory, or disciplinary authority to engage in a sexual act with a person in their custody on federal property.2Office of the Law Revision Counsel. 18 USC 2243 – Sexual Abuse of a Minor, a Ward, or an Individual in Federal Custody State versions often reach further, covering school employees, foster parents, and clergy.
Incapacitation
A person who is unconscious, asleep, or too intoxicated to understand what is happening cannot legally consent. The test is not whether someone had been drinking but whether they were too impaired to grasp what was going on, who they were with, or their ability to refuse. Courts look at observable behavior and the totality of the circumstances rather than a specific blood-alcohol level.
Marriage Exceptions
About 36 jurisdictions include a marriage defense in their age-of-consent statutes or exempt married couples from age-based sex offense laws entirely. The remaining 20 offer no marriage exception.5U.S. Department of Justice. Conflicts Between State Marriage Age and Age-Based Sex Offense Laws Where the exception exists, it generally shields an older spouse from prosecution for consensual sexual activity with a legally married younger spouse. This area is shifting as many states move to raise or eliminate minimum marriage ages.
Mistake About Age Is Usually Not a Defense
Statutory rape is a strict liability offense in the vast majority of states. The prosecution does not need to prove the defendant knew the other person was underage. A genuine, reasonable belief that the other person was old enough, even backed by a fake ID or a lie about age, generally does not matter. If the other person was under the age of consent, the crime is complete.
Federal law is a partial exception. Under 18 U.S.C. § 2243, a defendant charged with sexual abuse of a minor on federal land can argue they reasonably believed the other person was at least 16, but the defendant carries the burden of proving that belief by a preponderance of the evidence.2Office of the Law Revision Counsel. 18 USC 2243 – Sexual Abuse of a Minor, a Ward, or an Individual in Federal Custody Under most state laws, the defendant’s state of mind about age is simply irrelevant.
Sexting and Explicit Images
The state-federal gap creates its sharpest trap here. A 16-year-old is above the age of consent for sexual activity in 34 states, but federal child pornography law defines a minor as anyone under 18.6Office of the Law Revision Counsel. 18 USC 2256 – Definitions for Chapter 110 A sexually explicit image of a 16- or 17-year-old is child pornography under federal law regardless of whether the person depicted could legally have sex in their state, took the photo themselves, or shared it with someone the same age.
Teenagers who send explicit images to each other can technically face federal charges for producing, distributing, and possessing child pornography, which carry severe mandatory minimum sentences. Some states have created lighter penalties for teen sexting to avoid the harshest outcomes, but federal law has no such carve-out. An adult over 18 who receives an explicit image from a 17-year-old partner, even in a state where the relationship itself is lawful, possesses child pornography under 18 U.S.C. § 2256.
Criminal Penalties
The consequences of an age-of-consent conviction reach far beyond the sentence itself.
Prison Time
State sentences depend on the ages involved and the degree of the offense. First-time statutory rape convictions commonly run from 2 to 20 years, and the most serious cases, involving very young victims or large age gaps, can carry mandatory minimums of 10 years or more. Federal convictions under 18 U.S.C. § 2243 carry up to 15 years, and interstate transportation of a minor under 18 U.S.C. § 2423 starts at a 10-year mandatory minimum and reaches life.3Office of the Law Revision Counsel. 18 USC 2423 – Transportation of Minors
Sex Offender Registration
SORNA sets three registration tiers: 15 years for Tier I, 25 years for Tier II, and lifetime registration for Tier III.4Office of the Law Revision Counsel. 34 USC 20911 – Relevant Definitions, Including Amie Zyla Expansion of Sex Offense Definition Registered individuals appear on public databases searchable by employers, landlords, and neighbors. Many states add residency restrictions that prohibit living near schools, parks, or daycare centers. These effects often prove harder to live with than the prison term.
Other Long-Term Effects
A conviction follows a person through almost every institution that runs a background check. Professional licensing boards in healthcare, education, law, and social work routinely deny or revoke licenses. Child custody, immigration, and housing decisions are all affected. For non-citizens, a sex offense conviction almost always triggers deportation proceedings.
Civil Lawsuits
Criminal prosecution is not the only exposure. Victims can file civil lawsuits for monetary damages under the lower “preponderance of the evidence” standard, meaning a defendant acquitted in criminal court can still lose a civil case built on the same conduct. Many states have extended or eliminated their statutes of limitations for childhood sexual abuse, and some have opened temporary revival windows for previously time-barred claims. Institutions that employed or supervised the perpetrator, such as schools, churches, or sports organizations, can also face civil liability for negligent supervision.