Open carry in Missouri is legal without a permit for anyone who can lawfully possess a firearm, and the state does not require registration or licensing to carry a visible handgun or long gun in most public places. The bigger picture is where people get tripped up: Missouri’s preemption law lets a handful of cities regulate open carry, several categories of buildings are off-limits regardless of state law, and federal rules, especially the one covering school zones, apply on top of everything Missouri permits.
Who Can Open Carry
Missouri has no state statute setting a minimum age specifically for open carry. The age of 19 often mentioned in gun discussions comes from the state’s permitless concealed carry provision, which took effect January 1, 2017.1Missouri Senate. SB 656 Fact Sheet Federal law separately blocks licensed dealers from selling handguns to anyone under 21 and restricts handgun possession by juveniles under 18, which sets a practical floor even where state law is quiet.
Certain people cannot possess a firearm at all in Missouri. Under Section 571.070, that includes anyone convicted of a felony, a fugitive from justice, someone habitually intoxicated or in a drugged condition, or a person adjudged mentally incompetent.2Missouri Revisor of Statutes. Missouri Code 571 – Unlawful Possession of a Firearm Federal prohibited-person categories are broader and pick up people convicted of a misdemeanor crime of domestic violence, those subject to certain protective orders, and unlawful users of controlled substances. Violating Missouri’s prohibition is a felony carrying up to four years in prison.3Missouri Revisor of Statutes. Missouri Code 557 – Classification of Offenses
Cities That Can Restrict Open Carry
Missouri’s preemption statute reserves nearly all firearms regulation to the legislature, wiping out most local gun rules.4Missouri Revisor of Statutes. Missouri Code 21 – Firearms Legislation Preemption by General Assembly One carve-out survives: municipalities can pass ordinances regulating the open carrying of firearms. St. Louis and St. Louis County are the well-known examples, and both require anyone open carrying to hold a valid concealed carry permit.
If you hold a Missouri concealed carry permit and enter a jurisdiction that restricts open carry, you can still carry openly, but you must keep the permit on you and produce it on demand from a law enforcement officer.4Missouri Revisor of Statutes. Missouri Code 21 – Firearms Legislation Preemption by General Assembly Without a permit, open carrying in one of these cities violates the local ordinance. Because permitless concealed carry lets many gun owners skip the permit process entirely, this is the most common way an otherwise law-abiding Missouri carrier ends up on the wrong side of the law.
Where You Cannot Carry Under State Law
Section 571.030 treats carrying a firearm into several locations as unlawful use of weapons, regardless of open or concealed status:5Missouri Revisor of Statutes. Missouri Code 571 – Unlawful Use of Weapons
- Schools, school buses, and school-sponsored events, loaded or unloaded. Narrow exceptions cover designated school protection officers and sanctioned activities like ROTC.
- Churches and places of worship, unless the governing body consents.
- Polling places on election day.
- Any building owned or occupied by a federal, state, or local government agency.
Section 571.107 adds a separate list of locations where even a concealed carry permit is not enough: police and sheriff stations, courthouses, detention and correctional facilities, and higher education campuses, absent consent from the relevant authority. The same statute restricts concealed carry within 25 feet of a polling place on election day.6Missouri Revisor of Statutes. Missouri Code 571 – Permit Does Not Authorize Concealed Firearms, Where For many of these places, leaving your firearm locked in your vehicle on the premises is not itself a criminal offense, so long as you don’t remove or brandish it.
Federal Rules That Apply on Top of Missouri Law
Missouri’s permissive rules do not override federal firearms law. Two federal provisions catch open carriers most often.
Federal Buildings
Bringing a firearm into any federal facility is a federal offense with penalties up to one year in prison. Federal courthouses carry up to two years, and carrying with intent to commit a crime raises the cap to five years.7Office of the Law Revision Counsel. 18 USC 930 – Possession of Firearms and Dangerous Weapons in Federal Facilities Post offices, VA hospitals, Social Security offices, federal courthouses, and IRS offices all qualify. Missouri open carry rights end at the door.
The 1,000-Foot School Zone Rule
This is the trap most Missouri open carriers don’t see coming. Federal law makes it a crime to possess a firearm within 1,000 feet of any public or private school, with an exception for individuals licensed by the state if the state requires law enforcement to verify the person’s qualifications before issuing the license.8Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Missouri’s permitless carry framework almost certainly does not fit that exception, because no verification step happens before someone starts carrying. A 2025 federal court decision in Montana reached exactly that conclusion for a similar permitless carry scheme.
The practical effect: carrying within 1,000 feet of a school in Missouri without a state-issued concealed carry permit exposes you to federal charges. Holding a Missouri permit, though state law doesn’t require one, is the cleanest way to fall inside the federal exception. In cities and suburbs, that 1,000-foot ring is easy to cross without noticing.
Private Property and Posted Signs
Property owners can prohibit firearms on their premises. When a sign meets Missouri’s statutory requirements (at least 11 by 14 inches, lettering at least one inch tall, conspicuously placed), carrying a concealed firearm past it violates the law.5Missouri Revisor of Statutes. Missouri Code 571 – Unlawful Use of Weapons Even where signs are posted, keeping a firearm inside your vehicle on the property is generally not a criminal offense, though employers can separately prohibit employees from carrying in company vehicles.
The first-time penalty for carrying past a properly posted sign is typically an infraction rather than a misdemeanor, and you can be asked to leave. Refusing to leave while armed pushes the situation into trespassing. Signs that meet the size and placement rules carry real legal weight in Missouri.
Penalties for Getting It Wrong
The severity depends on where you carried and what happened:
- Class B misdemeanor: carrying into a church, polling place, or government building without authorization, discharging a firearm within 100 yards of a school, courthouse, or church, or shooting across a public highway. Maximum penalty is six months in jail.9Missouri Revisor of Statutes. Missouri Code 558 – Terms of Imprisonment
- Class E felony: carrying a firearm into a school, shooting into an occupied building or vehicle, or shooting at or from a motor vehicle. Up to four years in prison.3Missouri Revisor of Statutes. Missouri Code 557 – Classification of Offenses
Displaying a firearm in an angry or threatening manner is a separate offense, and possessing a firearm while knowingly holding a controlled substance in quantities that support a felony drug charge is also classified as unlawful use of weapons.5Missouri Revisor of Statutes. Missouri Code 571 – Unlawful Use of Weapons
Traffic Stops and Police Encounters
Missouri does not require you to volunteer to a law enforcement officer that you are carrying. The one exception is the preemption carve-out described above: if you are open carrying in a jurisdiction that bans it and are relying on your concealed carry permit to do so, you must produce the permit on demand.4Missouri Revisor of Statutes. Missouri Code 21 – Firearms Legislation Preemption by General Assembly
Federal courts, including the Eighth Circuit which covers Missouri, have held that in states where open carry is legal, the mere sight of a person carrying a visible firearm does not give police reasonable suspicion to stop and detain them. Officers need additional facts pointing to criminal activity. Context still matters: carrying near a school, holding the firearm in a ready position rather than holstered, or acting erratically can combine with the visible weapon to justify a stop. Calm cooperation during any encounter, even one that seems unjustified, is the safest practical response.
Why a Permit Is Still Worth Getting
Permitless carry leads a lot of Missouri gun owners to skip the concealed carry permit process. In practice, the permit solves several problems at once. It lets you open carry in municipalities that would otherwise prohibit it. It satisfies the federal Gun-Free School Zones Act exception, so a walk past a school isn’t accidentally a federal crime. And it provides reciprocity with other states, most of which recognize Missouri permits but will not honor permitless carry from another state. The permit application fee is capped at $100, and lifetime permits are available for $500.10Missouri Senate. SB656 – Modifies Provisions Relating to County Sheriffs, Self Defense, Unlawful Use of Weapons, and Concealed Carry Permits