Kansas Romeo and Juliet Law: Age of Consent, Close-in-Age Rules, and Penalties

Overview

Kansas is the one state where “Romeo and Juliet law” is not just a nickname. The provision at K.S.A. § 21-5507 — unlawful voluntary sexual relations — is universally known by that name in Kansas practice, and it functions as a distinct, reduced offense rather than a defense to a more serious one.

Kansas is also where the most consequential constitutional litigation about these laws happened. When the statute was enacted, it applied only to couples of the opposite sex. A young man named Matthew Limon, who was eighteen and had consensual contact with a fourteen-year-old boy at a residential facility, received a sentence measured in years rather than months because the reduction was unavailable to him. In State v. Limon (2005), the Kansas Supreme Court held that excluding same-sex couples from the provision violated equal protection, and struck the limitation.

That decision matters well beyond Kansas. It established that close-in-age provisions cannot be selectively withheld on the basis of the parties' sex — a principle now reflected in the gender-neutral drafting of these statutes nationwide.

The third thing to know about Kansas is the contrast at the other end. Below 14, Kansas applies Jessica's Law, one of the most severe sentencing regimes in the country, carrying off-grid life sentences with twenty-five-year mandatory minimums.

1. Does Kansas Have a Romeo and Juliet Law?

Yes — and it's one of the few states where the statute is actually known by that name. K.S.A. § 21-5507, unlawful voluntary sexual relations.

2. Age of Consent in Kansas

Sixteen. A person 16 or older can generally consent to sexual activity in Kansas. Below 16, the structure runs: Rape, K.S.A. § 21-5503, covers sexual intercourse with a child under 14 regardless of consent, along with circumstances involving force or incapacity. Indecent liberties with a child, K.S.A. § 21-5506, reaches sexual conduct with a child 14 or 15. Aggravated indecent liberties applies where the child is under 14. Unlawful voluntary sexual relations, K.S.A. § 21-5507 — the Romeo and Juliet statute — provides the reduced offense.

3. Close-in-Age Exception Explained

Two features distinguish this from most states' arrangements. It's a separate offense, not a defense. A person who qualifies is charged under § 21-5507 rather than under the more serious statute. This is structurally different from Arizona or Delaware, where the conduct is charged at full severity and the defendant must raise a defense afterward. In Kansas, qualifying facts change what gets filed. But it does not decriminalize. Section 21-5507 is still a felony — a low-severity felony on Kansas's sentencing grid, but a felony. The offense level varies by the conduct involved, sitting at severity level 8, 9, or 10 on the person felony scale. Under Kansas's grid, offenders without significant criminal history at these levels typically face presumptive probation rather than prison, which is the practical benefit.

4. Legal Age Gap Rules

Section 21-5507 applies where all of the following hold: the younger person is 14 or 15; the offender is under 19 years of age; the offender is less than four years older than the younger person; and the conduct was voluntary. Following Limon, the provision applies regardless of the parties' sex. The offender-age ceiling of 19 is absolute. A nineteen-year-old with a two-year gap does not qualify, because the provision is confined to a high-school-aged cohort rather than to any two people close in age. This mirrors Arizona's under-19-or-in-high-school requirement and Georgia's 18-or-younger ceiling. On the gap itself, “less than four years older” is not satisfied at exactly four years — a boundary case that turns on exact birth dates.

Jessica's Law: The Other End of the Scale

Kansas enacted Jessica's Law at K.S.A. § 21-6627, and the contrast with § 21-5507 could hardly be sharper.

For specified sex offenses against a child under 14 where the offender is 18 or older, Kansas imposes an off-grid sentence — meaning it sits outside the ordinary sentencing grid entirely — of life imprisonment with a mandatory minimum of 25 years before parole eligibility. Subsequent convictions carry higher minimums.

Departures below the mandatory minimum are possible only on findings of substantial and compelling reasons, and Kansas appellate courts have construed that standard narrowly.

The practical consequence for anyone reading this page: in Kansas, whether the younger person was 13 or 14 at the time of the conduct can be the difference between presumptive probation and twenty-five years to life. Few states have a cliff that steep, and it is why the precise timeline in a Kansas case matters enormously.

Mistake of Age

Kansas does not provide a general reasonable-belief defense for these offenses. A defendant's belief about the other person's age does not defeat the age element.

Kansas has, however, addressed the question in litigation over the years, and the treatment can vary by offense. This is a question for Kansas counsel working from current authority rather than a general rule.

Marriage

Kansas raised its minimum marriage age, adding consent and approval requirements for those below 18. Older material describing Kansas as permitting marriage at very young ages is out of date. Confirm current requirements with counsel.

5. What Is Not Protected?

Section 21-5507 is narrow, and the following fall outside what it covers:

• Anyone under 14. The statute's floor is 14, and below it Jessica's Law exposure begins for adult offenders.
• Offenders 19 and older. The ceiling is absolute regardless of the gap.
• Involuntary conduct. The provision requires voluntariness. Allegations of force, threat, or incapacity move the case into the rape and aggravated statutes.
• Explicit images. Kansas's sexual exploitation of a child provisions use 18 as the threshold with no close-in-age accommodation. Two Kansas sixteen-year-olds — both at the age of consent — face felony exposure for producing or exchanging images. Section 21-5507 offers nothing here.
• Positions of authority. Kansas addresses certain custodial and institutional relationships separately.
• Conduct in another state. Kansas borders Missouri, Nebraska, Oklahoma, and Colorado. Colorado permits a ten-year gap for sixteen-year-olds; Missouri uses 17; Oklahoma and Nebraska use 16 with different structures. The Kansas City metropolitan area straddles the Missouri line, which makes this more than theoretical for a large share of Kansans. Using a phone or the internet to arrange a meeting can trigger 18 U.S.C. § 2422(b) and its ten-year mandatory minimum.

6. Examples

7. Possible Penalties

Kansas uses a sentencing grid that combines offense severity with criminal history to produce a presumptive sentence and a narrow range around it. This makes Kansas outcomes more predictable than in indeterminate states like Colorado or Hawaii — but it also means criminal history has an outsized effect, and a prior conviction can move a case from presumptive probation to presumptive prison at the same severity level.

8. Sex Offender Registration Risk

Kansas registers under the Kansas Offender Registration Act, K.S.A. § 22-4901 et seq., with registration periods of fifteen years, twenty-five years, or lifetime depending on the offense. Kansas's registry is publicly searchable and imposes in-person reporting obligations. Kansas has been the subject of significant litigation over whether its registration requirements are punitive for constitutional purposes — a question that affects retroactive application and that has produced a body of state and federal case law. Registration exposure differs sharply between § 21-5507 and the offenses above it, which is another reason the charging decision carries so much weight.

Statutes of Limitation

Kansas has eliminated limitation periods for its most serious sexual offenses against children and extended them substantially for others, in several instances tying the period to the victim's adulthood or to the availability of evidence. Which rule applies depends on the offense and on when the conduct occurred.

9. Official Statute Sources

Primary Kansas statutes and official government resources cited in this guide. Look each citation up on your state legislature's official website for the current text:

• Unlawful voluntary sexual relations
  K.S.A. § 21-5507
• Indecent liberties with a child; aggravated indecent liberties with a child
  K.S.A. § 21-5506
• Rape
  K.S.A. § 21-5503
• Mandatory term of imprisonment for certain sex offenses (Jessica's Law)
  K.S.A. § 21-6627
• Kansas Offender Registration Act
  K.S.A. § 22-4901 et seq.
• Equal protection challenge to the opposite-sex limitation
  State v. Limon (Kan. 2005)
• Kansas Legislature
  Official Kansas Statutes
• U.S. Department of Justice
  Citizen's Guide to U.S. Federal Law on the Sexual Abuse of Minors

10. When to Talk to a Lawyer

Before speaking with law enforcement or Department for Children and Families investigators, including in conversations framed as routine. Kansas cases turn on two boundaries with extreme consequences. The first is the offender's nineteenth birthday and the four-year mark, which together determine whether § 21-5507 is available at all — the difference between presumptive probation and a substantially higher grid position. The second is the younger person's fourteenth birthday, which determines whether Jessica's Law applies. Both are questions of exact dates. Documentation matters more here than in almost any other state, and it is worth assembling before any conversation with investigators.