Sex Offender Registry Laws in the United States

Almost every summary of American registration law opens with SORNA’s three tiers, as though they describe what happens across the country. They do not. SORNA sets federal minimum standards, and 32 of the 50 states have not substantially implemented them. In those states the tiers are a reference point, not the operative rule.

What SORNA actually is

The Sex Offender Registration and Notification Act is Title I of the Adam Walsh Child Protection and Safety Act of 2006. It establishes minimum standards for who registers, for how long, and how often they verify. What it does not do is directly impose a national registry on the states.

Compliance is encouraged through funding rather than mandate. A jurisdiction that fails to substantially implement SORNA faces a ten percent reduction in its Byrne Justice Assistance Grant allocation. Several states have concluded that the cost and legislative difficulty of conforming outweighs that penalty. The original implementation deadline was July 2009; no jurisdiction met it, and two extensions followed.

The three tiers

These are floors, not ceilings. States routinely impose longer periods, classify the same offense into a different tier, or decline the tier structure altogether in favour of a risk-based assessment of the individual. Two states can place identical conduct in different categories with very different consequences. Our Registration Duration Estimator illustrates the federal baseline, but the governing figure is always the state’s own.

States that have substantially implemented SORNA

The Department of Justice’s SMART Office maintains the authoritative list. As of September 2026 it comprises 18 states, alongside four territories and a large number of tribal jurisdictions:

The remaining 32 states operate registries that are not built to SORNA’s specifications. This is not a loophole and does not mean registration is lighter there — several non-implementing states have requirements stricter than SORNA demands. It means the federal framework is the wrong place to look for the answer.

Juvenile registration

The Adam Walsh Act redefined “convicted” to include certain juvenile adjudications of delinquency, and SORNA contemplates registration where the person was at least 14 at the time of a qualifying offense. That provision was among the most contested parts of the Act, and it is one of the standards states have most often declined to adopt.

Practice consequently varies more here than almost anywhere else in this area. Some states register juveniles broadly, others narrowly, others not at all for most offenses. The SMART Office does not require juvenile registrants to appear on a public website for a jurisdiction to be treated as having implemented the requirement, so registration and public listing are separate questions for young people even within compliant states.

Registration and notification are different things

Registration is the collection of information by law enforcement. Notification — the strand commonly called Megan’s Law — is making some of that information available to the public. Every state operates a public registry, generally searchable online, but what appears on it and for whom differs by state and by tier or risk classification. Someone can be required to register without appearing publicly.

Close-in-age cases and relief

Registration is where close-in-age provisions matter most, and also where they are most often misread. Some are drafted specifically to remove the registration requirement while leaving the conviction in place — the narrowest form of Romeo and Juliet relief and easily mistaken for a full exemption. Others eliminate liability entirely, so registration never arises. Others reduce the grade of the offense without touching registration at all.

Many states also provide a petition process for removal, and some have provisions aimed specifically at people whose offense arose from a close-in-age relationship. Eligibility generally turns on the offense category, the time elapsed, and compliance history, but the criteria differ so much between states that a general description is of little practical use. Anyone considering a petition should speak to an attorney licensed where the conviction occurred.

Failure to register

Failure to register is a distinct offense rather than an administrative lapse. Every state has its own provision, and SORNA requires that state penalties carry a maximum of at least one year. A separate federal offense at 18 U.S.C. § 2250 carries a fine and up to ten years’ imprisonment. These provisions operate in non-implementing states as well as implementing ones, and obligations continue across state lines — moving does not end them.

Getting accurate information

Registration law is unusually resistant to summary. It is set at state level, subject to frequent amendment, litigated regularly on constitutional grounds including retroactivity, and administered by agencies whose practice can differ from the statute’s text. Nothing on this page can substitute for the current code of the relevant state and an attorney who works in it. The lawyer directory is organised by state, and the legal aid directory covers free and low-cost representation.

Related guides

• Registration Duration Estimator
• Close-in-age exemptions by state
• Statutory offenses and how they are charged
• U.S. age of consent map
• Glossary of terms