Wisconsin law is among the least restrictive in the U.S. regarding pocket knives and other knives. As of 2025, there are no statewide restrictions on the type of knife, blade length, or whether a knife is carried openly or concealed for most adults. This includes pocket knives, switchblades, butterfly knives, and automatic knives-all are legal to own and carry.
Concealed Carry and Open Carry
- Open Carry: There are no restrictions on openly carrying any type of knife, including pocket knives, regardless of blade length.
- Concealed Carry: Most adults can lawfully carry pocket knives (and other knives) concealed. Wisconsin law specifically exempts knives from the general prohibition on carrying concealed “dangerous weapons” for most people.
Key Restrictions
While the law is broadly permissive, there are important exceptions:
- Felons and Prohibited Persons: Individuals prohibited from possessing firearms due to felony convictions, restraining orders, or certain mental health commitments cannot carry concealed knives that qualify as “dangerous weapons.” The definition of “dangerous weapon” includes any device designed as a weapon and capable of causing death or great bodily harm, or any device used in a manner likely to produce such harm. However, not all knives are automatically considered dangerous weapons; it depends on design and intended use.
- Minors: It is illegal to transfer a “dangerous weapon” (which may include certain knives) to a person under 18.
- Schools and Government Buildings: Knives are prohibited on K-12 school property and grounds, and local governments may restrict knives in government facilities.
Statewide Preemption
Wisconsin law preempts local knife ordinances, ensuring uniformity across the state. Local governments cannot enact knife laws stricter than state law, and “disorderly conduct” charges cannot be brought solely for carrying a knife unless there is clear criminal or malicious intent.
Switchblades and Blade Length
- Switchblades: Previously banned, switchblades are now legal to own and carry in Wisconsin.
- Blade Length: There is no state law restricting blade length for knives, including pocket knives. Any previous local ordinances about blade length are preempted and no longer enforceable.
Penalties
Violations of knife laws, particularly by prohibited persons or in restricted locations, are Class A misdemeanors and can result in up to 9 months in jail and/or a $10,000 fine.
Summary Table
| Aspect | Legal Status in Wisconsin |
|---|---|
| Open carry of pocket knives | Legal |
| Concealed carry of pocket knives | Legal (with exceptions for felons) |
| Switchblades/automatic knives | Legal |
| Blade length restrictions | None |
| Carry on school property | Illegal |
| Transfer to minors | Illegal for “dangerous weapons” |
| Local knife ordinances | Preempted by state law |
Wisconsin residents and visitors enjoy broad rights to own and carry pocket knives, openly or concealed, regardless of blade length or type. The main exceptions involve felons, minors, and restricted locations like schools. Always check for the latest updates and exercise caution if you fall into a restricted category or are near sensitive locations.
Sources:
- https://www.akti.org/state-knife-laws/wisconsin/
- https://milwaukee-criminal-lawyer.com/wisconsin-knife-laws-2023/
- https://ravencresttactical.com/wisconsin-knife-laws/
- https://nobliecustomknives.com/us-knife-laws/wisconsin-knife-laws/