California Knife Laws (2025)

October 11, 2025

California Knife Laws (2025)

California Knife Laws (2025)

What You'll Find Here:

01 Breaking Down California’s Knife Restrictions

02 Knife Laws in California: A Quick History

03 Legal Definitions of Knives in California

04 Knife Ownership in California

05 Knife Carry Laws in California

06 Automatic Knives in California

07 Location-Based Restrictions

08 Impact of State Preemption on Local Ordinances

09 Penalties and Legal Consequences

10 Knife Laws for Specific Groups

11 Practical Advice for Knife Owners & Professionals

PEOPLE ARE ASKING

What is the blade-length rule for automatic/OTF knives in California?

In California, automatic (switchblade/OTF) knives with blades of two inches or more are generally prohibited for carry, public possession, and transfer. Sub-2 inch models are the common California-legal option.

Are sub-2 inch California-legal mini OTF knives allowed to carry?

Yes, sub-2 inch automatic blades are typically allowed, but you must still avoid restricted locations such as schools, government buildings, and certain transit facilities, and comply with any local rules.

Does Penal Code 21310 set a blade length for knives?

No. PC 21310 addresses concealed carry of dirks or daggers. The two-inch threshold for switchblades and OTFs derives from other California provisions that specifically regulate automatic knives.

Where are knives restricted regardless of blade length?

Sensitive places such as K-12 schools and college campuses, public buildings, and airports have heightened restrictions. Always check posted rules and local ordinances before carrying.

Are assisted-opening knives treated the same as switchblades?

No. Assisted-opening knives that require pressure on the blade and have a bias toward closure are generally not classified as switchblades. Fully automatic or OTF knives deploy via a button or similar device.

Why do brands market California-legal mini OTFs?

Manufacturers build compact OTFs with blades under two inches to meet California’s switchblade threshold while offering quick, practical deployment for everyday tasks.

How can I stay compliant when carrying a knife in California?

Choose tools that meet statewide rules such as sub-2 inch automatics if you prefer OTF, avoid restricted locations, and verify any stricter city or county ordinances.