Legal note: This page is a CJRB educational summary, not legal advice. California knife law is more restrictive than many states, and local, federal, school, airport, court, workplace, event, public-transit, park, and private-property rules may add restrictions. Use the Justia links below as a starting point and consult a qualified attorney for legal advice.
Last checked: July 24, 2026 · Primary source: Justia 2025 California Penal Code
California Knife Law Snapshot
Short version: California is high caution for EDC knife carry. Closed pocket knives and closed folding knives are usually the easiest category, but concealed dirks or daggers, fixed blades, switchblades, ballistic knives, and disguised knives need close review.
Lower risk when carried closed and not otherwise prohibited.
Use extra caution. Open waist-sheath carry is the clearer route.
Concealed carry can trigger Penal Code section 21310.
Carry, public vehicle-area possession, and transfer/sale conduct are restricted.
Can You Carry a Knife in California?
| Situation | Plain-English summary | Status | Source |
|---|---|---|---|
| Closed pocket knife | Usually the lowest-risk EDC category. California's dirk/dagger definition treats pocket knives differently unless the blade is exposed and locked into position. | Generally allowed | § 16470 |
| Closed folding knife | Lower risk when closed. Do not assume the same answer if the blade is open and locked. | Generally allowed | § 16470 |
| Fixed blade, open waist sheath | California section 20200 says a knife in a sheath worn openly suspended from the waist is not concealed for the listed concealed-weapon sections. | Open carry only | § 20200 |
| Concealed fixed blade / dirk or dagger | High risk. Penal Code section 21310 punishes concealed carry of a dirk or dagger. | Restricted | § 21310 |
| Switchblade, automatic, gravity-style, OTF-style knife 2+ inches | High caution. California restricts switchblade carry on the person, public vehicle-area possession, and sale/transfer conduct when the blade is two inches or longer. | Restricted | § 17235, § 21510 |
| Ballistic or disguised knife | Restricted. California separately regulates ballistic knives and multiple disguised-knife categories. | Restricted | § 21110, Ch. 2 |
Open Carry and Concealed Carry Details
California's practical EDC rule is not just "open" versus "concealed"; it depends on whether the knife can be treated as a dirk or dagger and whether a folding knife is closed or locked open.
Closed pocket knives are lower risk
California's dirk/dagger definition gives pocket knives and non-prohibited folding knives a safer lane when the blade is not exposed and locked open.
Source: § 16470
Open waist-sheath carry matters
For fixed blades or knives that may qualify as dirks or daggers, open carry in a sheath suspended from the waist is the clearest source-backed method for avoiding concealed-carry treatment.
Source: § 20200
Do not conceal a dirk or dagger
California section 21310 is the major concealed-carry risk for knives capable of ready use as stabbing weapons. Treat concealed fixed-blade carry as high risk.
Source: § 21310
Knife Type Notes
California has several specific restricted categories. The table below is a carry-risk overview, not legal advice.
| Knife type | California summary | Carry risk |
|---|---|---|
| Pocket knives | Best EDC fit when closed. Avoid carrying them open and locked in a way that resembles ready-use dirk/dagger carry. | Low to medium |
| Folding knives | Generally lower risk when closed. Open and locked blades raise more risk under the dirk/dagger definition. | Medium |
| Fixed blades | High caution. Carry openly in a waist sheath if carrying at all; do not conceal. | High |
| Switchblades / automatic knives / OTF-style knives | California's switchblade definition and restrictions use a two-inch blade threshold and include automatic/gravity-style mechanisms. | High |
| Balisongs / butterfly knives | High caution. Depending on mechanism and carry facts, these can create switchblade/gravity-style or dirk/dagger issues. | High |
| Ballistic knives | California separately restricts possession and commercial conduct involving ballistic knives. | Restricted |
| Disguised knives | Air gauge knives, belt buckle knives, cane swords, lipstick case knives, shobi-zue, writing pen knives, and undetectable knife conduct are addressed separately. | Restricted |
Places to Be Careful
California state knife statutes are only part of the risk picture. Specific places can be stricter than the general carry summary.
-
01Schools and campuses: Treat school property as high risk. Separate Education Code, school, and campus rules may apply.
-
02Courts and government buildings: Security rules may prohibit knives even when general state carry rules look permissive.
-
03Airports and federal property: Federal or facility rules can override ordinary EDC assumptions.
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04Public transit, parks, workplaces, and events: Local ordinances, agency rules, employer policies, and venue policies may add restrictions.
-
05Private property: Posted rules and owner/operator requests matter. Leave or store the knife if required.
Local Rules and Preemption
CJRB did not find an Arizona-style statewide knife preemption statute in the Justia California knife sections reviewed for this page. That means city, county, transit, park, campus, venue, workplace, and private-property rules may matter a lot.
Before carrying in California, check the state statute, the city or county you are in, and the rules for the specific place you plan to enter.
Relevant Justia Sources
| Source | Why it matters |
|---|---|
| CA Penal Code § 20200 | Open waist-sheath rule for knives not treated as concealed under listed sections. |
| CA Penal Code § 16470 | Dirk or dagger definition and pocket/folding knife treatment. |
| CA Penal Code § 21310 | Concealed dirk or dagger restriction. |
| CA Penal Code § 17235 | Switchblade knife definition and one-hand-opening exception language. |
| CA Penal Code § 21510 | Switchblade carry, vehicle-area possession, and transfer/sale restrictions for blades two inches or longer. |
| CA Penal Code § 21110 | Ballistic knife restrictions. |
| CA Penal Code Division 5, Chapter 2 | Disguised or misleading knife categories, including air gauge, belt buckle, cane sword, lipstick case, shobi-zue, undetectable, and writing pen knives. |
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