Mo. Rev. Stat. » Chapter 574
Missouri Revised Statutes

Mo. Rev. Stat. § 574.040 (2026)

Unlawful assembly

✓ current as of May 2026
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  574.040.  Unlawful assembly — penalty. — 1.  A person commits the offense of unlawful assembly if he or she knowingly assembles with six or more other persons and agrees with such persons to violate any of the criminal laws of this state or of the United States with force or violence.

  2.  The offense of unlawful assembly is a class B misdemeanor.

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(L. 1977 S.B. 60, A.L. 2014 S.B. 491)

Effective 1-01-17

Notes of Decisions
Cited in 10 cases (7 in the last 5 years), 1986–2024 · leading case: State v. Mast, 713 S.W.2d 601 (Mo. Ct. App. 1986).
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State v. Mast, 713 S.W.2d 601 (Mo. Ct. App. 1986). · cites it 4× “Defendant, Steve Mast, appeals his jury conviction on Count I, unlawful assembly in violation of § 574.040 RSMo (1979), a Class B misdemeanor, and on Count II, refusal to disperse from an unlawful assembly, in violation of § 574.”
Abdullah v. Cnty. of St. Louis, 52 F. Supp. 3d 936 (E.D. Mo. 2014). · cites it 2× “Mo.Rev.Stat. § 574.040. A “riot” requires that the six or more assembled people actually violate criminal laws with force or violence.”
Edwards v. Florissant, Missouri, City of (E.D. Mo. 2021). · cites it 8× “” See Mo. Rev. Stat. § 574.040 . As the Supreme Court has noted, “[t]he constitutional guarantee of liberty implies the existence of an organized society maintaining public order, without which liberty itself would be lost in the excesses of anarchy.”
Baude v. City of Saint Louis, Missouri (E.D. Mo. 2020). · cites it 5× “First, Mo. Rev. Stat. § 574.040 , requires that the group act in concert, State v.”
Newbold v. City of Saint Louis, Missouri (E.D. Mo. 2021). · cites it 2× “” Mo. Rev. Stat. § 574.040 (eff. Jan. 1, 2017).”
Davis v. City of Saint Louis, Missouri (E.D. Mo. 2021). · cites it 2× “” Mo. Rev. Stat. § 574.040 (eff. Jan. 1, 2017).”
Nelson v. City of Saint Louis, Missouri (E.D. Mo. 2021). · cites it 2× “” Mo. Rev. Stat. § 574.040 (eff. Jan. 1, 2017).”
Gullett v. City of St. Louis (E.D. Mo. 2021). · cites it 2× “” Mo. Rev. Stat. § 574.040 (eff. Jan. 1, 2017).”
Ron DeSantis, Governor v. Dream Defenders (Fla. 2024). “1 (2014); Mo. Rev. Stat. § 574.040 (2000); N.C. Gen.”
Ortega v. City of St. Louis, Missouri (E.D. Mo. 2021). “§ 574.040 (eff. Jan. 1, 2017). A person commits the offense of refusal to disperse “if, being present at the scene of an unlawful assembly, or at the scene of a riot, he or she knowingly fails or refuses to obey the lawful command of a law enforcement officer to depart from the…”
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