November 12, 2025

Hawaii Knife Laws (2025)

What You'll Find Here:

01. Hawaii Knife Laws Explained
02. Timeline of Hawaii Knife Laws
03. Legal Definitions of Knives in Hawaii
04. Knife Ownership in Hawaii
05. Knife Carry Laws in Hawaii
06. Location-Based Restrictions

07. State Preemption and Local Ordinances
08. Penalties and Legal Consequences
09. Knife Laws for Specific Groups
10. Travelers Passing Through Hawaii
11. Practical Advice for Knife Owners & Professionals

Hawaii Knife Laws Explained

Timeline of Hawaii Knife Laws

Legal Definitions of Knives in Hawaii

Knife Ownership in Hawaii

Knife Carry Laws in Hawaii

Location-Based Restrictions

State Preemption and Local Ordinances

Penalties and Legal Consequences

Knife Laws for Specific Groups

Travelers Passing Through Hawaii

Practical Advice for Knife Owners & Professionals

PEOPLE ARE ASKING

Are automatic (switchblade) knives legal in Hawaii now?

Yes. As of May 2024 (Act 21), it’s legal to own switchblade knives in Hawaii — but carrying them concealed is still illegal.

Can I carry a knife in public in Hawaii?

Yes, if it’s openly visible. Concealed carry (like in a pocket, bag, or vehicle compartment) is generally illegal for most knife types.

What is considered “concealed carry” in Hawaii?

Any knife hidden from view, including inside a backpack, pocket, glovebox, or under clothing.

Are butterfly (balisong) knives legal in Hawaii?

Yes, Act 21 repealed the ban. They are legal to own, but cannot be carried concealed.

Can I bring a knife on a plane or to the airport in Hawaii?

No. Federal TSA regulations prohibit knives in carry-on luggage or secure airport areas. Pack them in checked baggage only.

Does Hawaii have a blade length limit?

No specific statewide blade-length limit exists — what matters is concealment, not size.

Does Hawaii have statewide preemption?

No. Each county can have its own rules or ordinances, so always check local laws.

Have Hawaii's knife laws changed since 2022?

Yes. In 2024, Hawaii passed Act 21, which repealed old bans on owning switchblade and butterfly knives. The law now focuses on how knives are carried — concealed carry remains illegal statewide.

Which types of knives are legal to own in Hawaii?

All knives are legal to own in Hawaii. The 2024 reform (Act 21) removed previous bans on switchblades and butterfly knives. There are no statewide ownership restrictions.