What Is the Legal Definition of a Lewd Act in California?

Under California law, a “lewd act” is one of two different crimes depending on who is involved and where it happens. Penal Code 288 covers sexually motivated touching of a child, and Penal Code 647(a) covers sexual touching in a public place. The legal definition of a lewd act in California turns on one shared element in both statutes: the person must have acted with sexual intent, not by accident and not for an innocent reason. Penalties range from a misdemeanor with up to six months in county jail to a life sentence in state prison, plus mandatory sex offender registration for any conviction involving a child.

What Counts as a Lewd Act With a Child

Penal Code 288 is what most people are asking about when they look up this term. The statute makes it a crime to touch a child under 14 anywhere on the body, or to cause the child to touch themselves or someone else, if the touching is done for sexual arousal or gratification.¹

The reach of the statute is wider than many people assume. It does not list specific body parts, and it does not require skin-to-skin contact. Touching through clothing is enough, as California courts have confirmed.² Any part of the child’s body can qualify.

A separate subsection applies when the child is 14 or 15 and the defendant is at least 10 years older, measured birthdate to birthdate. The same intent requirement applies, and the penalties are lower than for victims under 14.¹

Why Sexual Intent Is the Core Element

Intent is what separates a lewd act from ordinary contact. The prosecution has to prove the defendant touched the child, or caused the touching, for the purpose of sexual arousal or gratification. Without that proof there is no crime under Penal Code 288, even when the contact involved an intimate part of the body.¹

This is where most contested cases are actually fought. A parent helping a young child bathe, a doctor performing an exam, a coach adjusting an athlete’s form — none of these are lewd acts, because the sexual motivation is missing. Prosecutors typically build intent through circumstances: the nature of the contact, the relationship between the parties, statements made before or after, and whether the contact had any plausible non-sexual explanation. A jury does not need a confession. Intent can be inferred from the surrounding facts.

What a Lewd Act Charge Can Cost

Punishment under Penal Code 288 depends on the child’s age, whether force was used, and whether the defendant inflicted bodily harm.

Child under 14, no force (PC 288(a)): a felony punishable by three, six, or eight years in state prison.¹
Child under 14, with force or threats (PC 288(b)(1)): a felony carrying five, eight, or ten years in state prison.
Dependent adult touched by a caretaker, with force (PC 288(b)(2)): the same five, eight, or ten years in state prison.
Child aged 14 or 15, defendant 10 or more years older (PC 288(c)(1)): one, two, or three years in state prison, or up to one year in county jail.
Bodily harm personally inflicted (PC 288(i)): life in state prison with the possibility of parole, when the bodily harm is specifically charged and proven.

Every conviction under Penal Code 288 also triggers mandatory sex offender registration under Penal Code 290.³ California uses a tiered system, and Penal Code 288 convictions involving force or victims under 14 generally fall into the highest tiers, which can mean 20 years or life on the registry. Registration requires in-person appearances at local law enforcement, current photographs, address updates whenever the person moves, and listing on the state’s Megan’s Law database. Failing to register is a separate felony. The practical consequences — housing restrictions, employment barriers, community notification — often outlast the prison sentence.

What Counts as Lewd Conduct in Public

Penal Code 647(a) describes a very different situation: sexual behavior in a public place. It makes it a misdemeanor to engage in or solicit sexual touching in a public location, somewhere open to the public, or anywhere exposed to public view.⁴ California’s standard jury instructions set out five elements the prosecution must prove:

The defendant willfully touched their own or another person’s genitals, buttocks, or female breast.
The touching was done with intent to sexually arouse or gratify someone, or to annoy or offend another person.
The defendant was in a public place or a location open to public view.
Someone who might have been offended was actually present.
The defendant knew, or reasonably should have known, that such a person was present.⁵

That last element matters more than people expect. A couple in an apparently deserted park at 2 a.m. is in a different legal position than someone in a crowded parking lot at noon. The prosecution does not have to show the observer was actually offended, only that the defendant should have known someone who might be offended was nearby.⁵ The same conduct between consenting adults that is perfectly legal behind closed doors becomes criminal the moment it happens where other people can see it.

A Penal Code 647(a) conviction carries up to six months in county jail and a fine. The penalty is far lighter than under Penal Code 288, but a lewd conduct conviction on a criminal record can still affect employment and professional licensing.

How This Differs From Indecent Exposure

Lewd acts and indecent exposure are often confused, but they are separate crimes. Indecent exposure under Penal Code 314 involves willfully exposing your private parts in a public place or where other people who might be offended are present.⁶ The core difference: indecent exposure is about showing, lewd conduct is about touching.

A first indecent exposure offense is a misdemeanor. A second conviction, or a first conviction by someone with a prior Penal Code 288 conviction, becomes a felony punishable by state prison time, and indecent exposure also triggers sex offender registration under Penal Code 290.⁶

Defenses That Actually Work

Because specific intent is a required element, the strongest defenses go straight at that element.

Lack of sexual intent is the most direct. If the touching had a legitimate, non-sexual purpose — a medical examination, help with bathing or dressing, an incidental bump — the prosecution cannot meet its burden. The contact itself is not enough. The reason behind it is what the jury has to evaluate.

Accidental touching defeats the “willfully” requirement. The defendant has to have acted deliberately, not by accident or reflex. Crowded environments, physical activities, and caregiving can all produce contact that looks worse than it was.

False allegations come up more often in lewd act cases than in many other crime categories, particularly during custody disputes or family conflicts. Many Penal Code 288 cases have no physical evidence, so the entire prosecution may rest on one person’s account. Defense work in those cases often focuses on inconsistencies, motive to fabricate, and the circumstances of the disclosure.

Two things are not valid defenses to a Penal Code 288 charge, and both are commonly misunderstood. A child cannot legally consent to sexual activity in California, so consent is never a defense. And California courts have consistently held that a defendant’s mistaken belief about the child’s age does not provide a defense under Penal Code 288. If the child was under 14, the defendant’s belief that the child was older is irrelevant.

1
California Legislative Information. California Code PEN 288 – Lewd or Lascivious Acts With a Child
2
Justia Law. People v. Cruz-Villagran
3
California Legislative Information. California Code PEN 290 – Sex Offender Registration
4
California Legislative Information. California Code PEN 647 – Disorderly Conduct
5
Justia. CALCRIM No. 1161 – Lewd Conduct in Public
6
California Legislative Information. California Code PEN 314 – Indecent Exposure