Guide to Colorado Age of Consent Laws

March 24, 2026

Few things create more fear and confusion than realizing you are in the middle of a criminal investigation involving a sexual offense. You might feel shocked, embarrassed, or angry, especially if you believed the relationship was lawful.

Many people in this position struggle to understand how the law actually works or why prosecutors are suddenly involved in what they thought was a consensual situation. 

In Colorado, the age of consent is generally 17 years old, but situations involving younger individuals are governed by detailed age-gap rules that can determine whether a criminal charge applies.

You deserve clear answers and a defense that treats you with dignity. At Merson Law Office, LLC, our Colorado sex offense defense lawyers stand beside you as your advocate, helping you understand the law, protect your rights, and pursue the best possible outcome in your case.

For a free, confidential consultation, please call (970) 219-2923 or send us an online message today.

What Is the Legal Age of Consent in Colorado?

In most situations, the law allows someone who is 17 or older to consent to sexual activity. However, Colorado law treats situations involving minors differently depending on the ages involved, and certain close-in-age exceptions may apply under the state’s sexual assault statutes.

How Does the Colorado Age of Consent Law Work?

The Colorado age of consent law focuses on protecting minors from exploitation while recognizing that teenagers sometimes form relationships with people close to their own age. 

When prosecutors evaluate an allegation involving someone under 17, they often examine several factors, including:

• The exact ages of both individuals,
• The difference in age between them,
• Whether the allegation involves sexual contact or sexual penetration, and
• Whether one person had control over the other.

These factors determine which criminal statute may apply and whether a close-in-age exception could apply.

What Is the Age Gap Law in Colorado?

Many people refer to Colorado’s close-in-age exception as an age gap law, which generally applies to the following situations:

• A minor aged 15 or 16. That person may legally consent to sexual contact with someone who is less than 10 years older.
• A minor younger than 15. The law prohibits sexual contact when the other person is four or more years older.

These provisions recognize that relationships between teenagers or young people of similar ages may differ from situations in which a much older adult becomes involved with a minor.

Does the Romeo and Juliet Law Colorado Residents Mention Apply?

People often refer to these close-in-age rules as the “Romeo and Juliet Law” in Colorado. In practice, this term describes the age-gap provisions already written into Colorado’s criminal statutes. 

The law treats cases differently when:

• The age difference exceeds the legal limits;
• The conduct involves force, threats, or coercion; or
• One person holds a position of trust, such as a teacher, coach, or caregiver.

Prosecutors will likely pursue serious criminal charges when one of these circumstances exists.

What Crimes Can Arise from Violating the Age of Consent in Colorado?

When prosecutors believe someone violated Colorado’s age-of-consent laws, several criminal charges may apply, including:

• Sexual assault. This offense involves sexual intrusion or penetration without lawful consent.
• Sexual assault on a child. This charge often applies when someone knowingly subjects a child under 15 to sexual contact and the age difference exceeds the legal threshold.
• Unlawful sexual contact. This offense involves knowingly touching intimate parts for sexual purposes when the law does not recognize valid consent.
• Sexual assault by a person in a position of trust. Adults such as teachers, coaches, or caregivers may face separate charges when sexual conduct involves a minor under their supervision.

Depending on the circumstances, these charges may range from misdemeanors to serious felony offenses.

What Are the Possible Penalties for Violating Colorado Age of Consent Laws?

Penalties depend on the charge, the parties’ ages, and whether aggravating factors apply. 

Some sexual offenses carry extremely serious consequences under Colorado law, including:

• Prison sentences. The state may charge sexual assault as a Class 4 felony carrying two to six years in prison and mandatory parole.
• Sex offender registration. Certain convictions require registration as a sex offender, which may last 10 years, 20 years, or life, depending on the offense.
• Strict probation conditions. Courts may impose restrictions on internet use, employment, housing, and contact with minors.
• Long-term consequences. A sexual offense conviction can affect professional licenses, background checks, housing opportunities, and reputation.

Because these penalties can affect nearly every aspect of a person’s future, you must respond quickly to an investigation and speak with an attorney who can help protect your rights through the entire process.

How Can a Defense Attorney Challenge Age-of-Consent Allegations?

Cases involving alleged violations of consent laws often depend on specific facts about age differences, evidence, and timelines. 

A defense strategy may involve:

• Determining whether the close-in-age exception applies,
• Challenging unreliable witness statements or digital evidence,
• Identifying violations of constitutional rights during the investigation, and
• Examining whether prosecutors can prove the required elements of the offense.

Careful legal analysis often reveals weaknesses that are not obvious at the beginning of an investigation.

Why Choose Merson Law Office for a Colorado Age of Consent Case?

When your future depends on the smallest facts in a criminal case, experience matters. Attorney James Merson has spent more than 20 years defending people against serious charges in Colorado, and that experience helps him spot weaknesses in the prosecution’s case and build strong, practical defenses.

He has handled thousands of cases, tried nearly 100 jury trials, and earned the Colorado State Public Defender’s Attorney of the Year award for his trial work. 

At Merson Law Office, LLC, we believe every case is defensible, and we put that experience to work to pursue the best possible outcome for every client.

Whether you’re in Longmont, Boulder, Fort Collins, Weld County, Adams County, or anywhere else in Colorado, we can assist you. 

Protect Your Future Before It’s Too Late

Accusations involving age-of-consent laws can escalate quickly and carry serious consequences. Speaking with an experienced Colorado criminal defense attorney at our firm early can help you understand your options and begin building a strategy to protect your future. 

Contact us online or call (970) 219-2923 today to schedule a free consultation and learn how our team can help defend your rights.

Legal References Used to Inform This Page:

To ensure the accuracy and clarity of this page, we referenced official legal and other resources during the content development process:

• Sexual Assault Age Gap Law, Colo. Rev. Stat. § 18-3-402(d) and (e).
• Sexual Assault on a Child by One in a Position of Trust, Colo. Rev. Stat. § 18-3-405.3.
• Unlawful Sexual Contact, Colo. Rev. Stat. § 18-3-404.
• Felonies Classified, Presumptive Penalties, Colo. Rev. Stat. § 18-1.3-401(V.5)(A)(4).
• Sex Offender Registration, Colo. Rev. Stat. § 16-22-103.

About the Author

James Merson

Attorney

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