A Visual Guide to Wisconsin Knife Laws

A VISUAL GUIDE TO WISCONSIN KNIFE LAWS

Navigating the laws of the Badger State.

The Big Picture: Is It Legal to Carry a Knife?

Wisconsin has some of the most permissive knife laws in the country. For the most part, adults can own and carry a wide variety of knives. The main complexities arise from how and where you carry.

OWNERSHIP

LEGAL

It is legal to own almost any type of knife in Wisconsin, including Bowie knives, daggers, and stilettos.

OPEN CARRY

LEGAL

Openly carrying any legal knife is permitted. This means the knife is visible and not concealed from ordinary observation.

The Core Rule: Understanding Concealed Carry

The most important distinction in Wisconsin law is whether a knife is carried openly or concealed. State Statute 941.23 prohibits carrying a concealed “dangerous weapon.” The legality of a concealed knife hinges on whether it’s classified as such, which depends on its design and your intent.

The Concealment Test

Is the knife concealed?
Is it a “Dangerous Weapon”?
YES

If designed as a weapon (dagger, dirk) OR you intend to use it as one.

Likely Illegal

NO

If it’s a typical pocketknife or multi-tool without intent to cause harm.

Likely Legal

Carry Method At-A-Glance

A Look at Specific Knife Types

Wisconsin law treats different types of knives distinctly. While most are legal to own, the legality of carrying them can vary, especially for items like ballistic knives. A 2016 law change specifically legalized the carry of automatic knives (switchblades) for most adults.

Legal Status by Knife Type

Where You CAN’T Carry: Prohibited Locations

Even a legally carried knife is prohibited in certain sensitive locations. Carrying a knife into these areas can result in serious penalties, regardless of your intent.

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Schools & Grounds

Possession of a dangerous weapon on school property (K-12) is illegal.

🏛️

Govt. Buildings

Includes courthouses, police stations, and any secure government facility.

✈️

Airport Security

Knives are prohibited beyond TSA security checkpoints.

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Posted Businesses

Private businesses can prohibit weapons by posting signs at their entrances.

Mind Your Metropolis: Local Ordinances

While state law is permissive, some municipalities have stricter rules, particularly concerning carrying knives in city parks, on public transportation, or in city-owned buildings. Always check local regulations.

Comparing Local Restriction Levels

Key Takeaways

  • Madison often has specific restrictions for city buses and public buildings not covered by state law.
  • Milwaukee County has a system-wide ordinance that restricts weapons in parks without special permission.
  • This chart is illustrative. “Restriction Level” is a simplified score based on known ordinances. Real-world laws are more nuanced.
  • The absence of a city doesn’t mean no restrictions; it means they generally follow state law without adding significant layers.

Disclaimer

This infographic is intended for informational purposes only and does not constitute legal advice. Knife laws are complex and subject to change and interpretation. For specific legal questions, please consult with a qualified attorney or refer to the official Wisconsin State Statutes.