All Laws Decoded

Sex Offender Registration in Missouri

How Missouri law treats sex offender registration: what is illegal, whether it is a misdemeanor or felony, and the penalties, from the state code.

Short answer: People found guilty of offenses that make them tier I, II or III sex offenders (including out-of-state offenders who live, work or study in Missouri, and certain juveniles 14 or older adjudicated for the most serious offenses) must register within three business days of adjudication or… RSMo §§ 589.400, 589.401, 589.414, 589.425

Sex offender registrationPeople found guilty of offenses that make them tier I, II or III sex offenders (including out-of-state offenders who live, work or study in Missouri, and certain juveniles 14 or older adjudicated for the most serious offenses) must register within three business days of adjudication or release. Registration lasts 15 years for tier I, 25 years for tier II and life for tier III, and registrants may petition for removal only in limited cases. Changes of name, address, job or school must be reported in person within three business days; tier I offenders verify annually, tier II every six months and tier III every 90 days. Failing to register is a class E felony (up to 4 years), or a class D felony (up to 7 years) if the underlying offense was a serious sex offense; a third offense carries 10 to 30 years with electronic monitoring on release.
§§ 589.400, 589.401 and 589.414 read in versions effective August 28, 2026; § 589.425 version effective 1/1/2017 (an amended version effective January 1, 2028 makes a third offense a class A felony). B 5-15 years; C 3-10 years; D up to 7 years; E up to 4 years; class A misdemeanor up to 1 year and $2,000; class B misdemeanor up to 6 months and $1,000.

More Missouri criminal law

FAQ

What happens if you fail to register as a sex offender in Missouri?
People found guilty of offenses that make them tier I, II or III sex offenders (including out-of-state offenders who live, work or study in Missouri, and certain juveniles 14 or older adjudicated for the most serious offenses) must register within three business days of adjudication or release. Registration lasts 15 years for tier I, 25 years for tier II and life for tier III, and registrants may petition for removal only in limited cases. Changes of name, address, job or school must be reported in person within three business days; tier I offenders verify annually, tier II every six months and tier III every 90 days. Failing to register is a class E felony (up to 4 years), or a class D felony (up to 7 years) if the underlying offense was a serious sex offense; a third offense carries 10 to 30 years with electronic monitoring on release.
Can I get a court-appointed lawyer for sex offender registration in Missouri?
Missouri's rule on court-appointed lawyers: The state public defender system represents eligible indigent persons. Eligibility is determined by the state public defender (or a person working under the defender) based on the person's 'ability to make bond, his income and the number of persons dependent on him for support.' A person claiming indigency files an affidavit with the court containing the information the public defender commission requires; either party may ask the court where the case is pending to decide whether the public defender may represent the defendant. Knowingly making a false affidavit to obtain services is a class A misdemeanor. The section does not set an application fee. RSMo § 600.086
How much does a lawyer for sex offender registration cost in Missouri?
Lawyers set their own fees, and Missouri has rules on how they may charge. See hiring a criminal defense lawyer in Missouri for fee rules, how to check a lawyer's license and free help.
What happens after an arrest for sex offender registration in Missouri?
How release before trial works in Missouri: 'That all persons shall be bailable by sufficient sureties, except for capital offenses, when the proof is evident or the presumption great' (Mo. Const. art. I, § 20). By statute, a person charged with a bailable offense may be released on personal recognizance unless the judge finds that release will not reasonably assure the person's appearance; the judge may then impose conditions such as supervised custody, travel or association limits, a bail bond or cash deposit, reporting, or house arrest with electronic monitoring (§ 544.455.1). The judge considers the nature of the offense, the weight of the evidence, family ties, employment, financial resources, character and mental condition, length of residence, criminal record, and record of court appearances (§ 544.455.2). Conditions are reviewed for a person still detained after 24 hours because the person cannot meet them. Mo. Const. art. I, § 20; RSMo § 544.455 What happens after an arrest.
Can a conviction for sex offender registration be removed from my record in Missouri?
Each state sets its own rules for sealing or expunging records. See Missouri expungement and record sealing rules.

General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.