Is Butterfly Knife Legal in Montana? (2026)
Yes. In Montana, butterfly knife is legal. Butterfly knives (balisongs) are legal to own, carry, and sell in this state. Some municipalities may have local restrictions. Age requirements for purchase typically apply. Carry method (open vs concealed) may be regulated separately..
Key facts
- Status
- Legal
- Permit required
- No
- Jurisdiction
- Montana
- Last reviewed
- 2026-04-09
Butterfly Knife laws in Montana
In Montana, butterfly knives, also known as balisongs, are generally legal to possess, carry, and sell. There is no specific state statute explicitly prohibiting or restricting butterfly knives. However, it is important to note that Montana law does allow municipalities to enact their own ordinances regarding the carrying of knives. Therefore, residents and visitors should be aware that local regulations may impose restrictions on butterfly knives that differ from state law. As with many bladed weapons, age restrictions for purchase may apply, and it is advisable to verify these with retailers. While possession and sale are broadly permitted, the legality of carrying a butterfly knife, particularly concealed, can be subject to interpretation and local ordinances. Montana law generally permits the concealed carry of most knives, but specific restrictions on certain types of knives or locations might exist within municipal codes. Transportation of butterfly knives, especially across state lines or certain public transit systems such as those regulated by the TSA, may be subject to restrictions, with TSA expressly prohibiting them in carry-on luggage. Given the potential for local variations in regulations, it is crucial for individuals to research and understand the specific ordinances of any city or town they intend to carry a butterfly knife within. While state law does not detail specific penalties for butterfly knife violations, any infraction of local ordinances could result in fines or other penalties as determined by that municipality. It is also noteworthy that butterfly knives are often treated similarly to switchblades under general weapon regulations, and those regulations should be consulted for any further guidance. Travel considerations, particularly concerning air travel, should prioritize checking airline and TSA policies to avoid confiscation or legal issues.
Frequently asked questions
Is butterfly knife legal in Montana for travelers?
For travelers visiting Montana, butterfly knife is currently legal. In Montana, butterfly knives, also known as balisongs, are generally legal to possess, carry, and sell. There is no specific state statute explicitly prohibiting or restricting butterfly knives. However, it is important to note that Montana law does allow municipalities to enact their own ordinances regarding the carrying of knives. Therefore, residents and visitors should be aware that local regulations may impose restrictions on butterfly knives that differ from state law. As with many bladed weapons, age restrictions for purchase may apply, and it is advisable to verify these with retailers. While possession and sale are broadly permitted, the legality of carrying a butterfly knife, particularly concealed, can be subject to interpretation and local ordinances. Montana law generally permits the concealed carry of most knives, but specific restrictions on certain types of knives or locations might exist within municipal codes. Transportation of butterfly knives, especially across state lines or certain public transit systems such as those regulated by the TSA, may be subject to restrictions, with TSA expressly prohibiting them in carry-on luggage. Given the potential for local variations in regulations, it is crucial for individuals to research and understand the specific ordinances of any city or town they intend to carry a butterfly knife within. While state law does not detail specific penalties for butterfly knife violations, any infraction of local ordinances could result in fines or other penalties as determined by that municipality. It is also noteworthy that butterfly knives are often treated similarly to switchblades under general weapon regulations, and those regulations should be consulted for any further guidance. Travel considerations, particularly concerning air travel, should prioritize checking airline and TSA policies to avoid confiscation or legal issues.
Do I need a permit for butterfly knife in Montana?
Montana does not specifically require a permit for butterfly knife, though general regulations apply.
Can I transport butterfly knife through Montana?
Transport laws for butterfly knife in Montana depend on the specific item and your route. Generally, transport is allowed if you comply with state regulations. Always check states you pass through.
What are the penalties for butterfly knife violations in Montana?
Penalties for butterfly knife violations in Montana vary based on the specific offense. Always verify current laws before traveling.