Hawaii maintains some of the strictest knife laws in the U.S., balancing public safety with recent reforms legalizing certain blades.
As of 2026, switchblades, balisongs (butterfly knives), and gravity knives are permitted for ownership and open carry following 2024 legislative changes under HB2342, but concealed carry remains heavily restricted. This guide outlines what residents and visitors need to know to comply and avoid misdemeanor charges.
Legal Knives
Hawaii allows possession, sale, and transport of most common knives like folders, fixed blades, and multi-tools for everyday use (e.g., fishing, camping).
Automatic knives—including switchblades over 2 inches—are now legal statewide after court challenges invoking Second Amendment rights via Bruen precedent struck down prior bans. Balisongs and gravity knives joined the list in May 2024, effective immediately upon Governor Green’s signature.
No blade length limits apply to legal knives, but intent matters—tools for lawful purposes (work, outdoors) face less scrutiny.
Carry Restrictions
Open carry is broadly allowed for permitted knives anywhere not prohibited, provided no unlawful intent. Concealed carry is illegal for:
- Switchblades, balisongs, gravity knives.
- Dirks, daggers, or any blade designed as a weapon.
- Knives over certain sizes if deemed dangerous (case-by-case).
Pocket knives under 4 inches are typically OK concealed if not prohibited types, but courts advise open carry to avoid disputes. Law enforcement and military get exemptions on duty.
Prohibited Locations
Knives ban in:
- Schools and school grounds (zero tolerance).
- Courthouses, airports, bars.
- State/federal buildings, hospitals.
- Public events or beaches with posted rules.
Violations trigger immediate confiscation and fines.
Recent Changes
HB2342 (Act 021) repealed bans on autos, balis, and knuckles post-Teter v. Lopez, where the Ninth Circuit panel ruled butterfly bans unconstitutional—though en banc review loomed, reforms stuck. A 2025 push for sweeping “bladed weapon” bans (SB433) failed, preserving gains amid Bruen pressures. Penalties rose if used criminally. No 2026 reversals noted.
Penalties and Defenses
Misdemeanor possession: Up to 1 year jail, $2,000 fine; felonies if used in crimes. Defenses include lawful purpose (e.g., chef’s tool) or Second Amendment claims for recent legalizations. Challenge via suppression if seized illegally.
Practical Tips
Sheath fixed blades visibly; lock folders when carried. Tourists: Leave restricted knives home—airports confiscate ruthlessly. Check HRS §707-708 for updates; apps like Knife Rights track changes. Join local forums for Honolulu-specific advice. Store securely at home; educate kids on rules.
Hawaii’s laws evolve slowly, favoring restriction—when in doubt, don’t carry.
SOURCES:
- https://kniferights.org/legislative-update/hawaii-legalizes-butterfly-switchblade-gravity-knives/
- https://nobliecustomknives.com/us-knife-laws/hawaii-knife-laws/
