California’s concealed dirk or dagger law, Penal Code 21310, makes it a crime to carry a knife or other stabbing instrument hidden on your body anywhere in the state. The offense is a “wobbler,” meaning prosecutors can charge it as either a misdemeanor punishable by up to one year in county jail or a felony punishable by up to three years.1California Legislative Information. California Code PEN 21310 – Carrying Concealed Dirk or Dagger Whether your knife is legal to carry usually comes down to two questions: does the blade count as a dirk or dagger, and can anyone see it on you.
What Counts as a Dirk or Dagger
Penal Code 16470 defines the term broadly. A dirk or dagger is any knife or instrument that can readily be used as a stabbing weapon capable of causing great bodily injury or death. The item does not need a handguard, and it does not need to look like a traditional dagger.2California Legislative Information. California Code PEN 16470 – Definition of Dirk or Dagger A kitchen knife, a hunting knife, a stiletto, or an ice pick can all qualify. What matters is the physical capability of the object, not what you call it or what you intended to use it for.
This catches people off guard. A fixed-blade tool you bought at a sporting goods store is legally a dirk or dagger from the moment its design makes it effective for thrusting. Your purpose does not change that classification.
When a Folding Knife Becomes a Dagger
A closed pocketknife or folding knife is not a dirk or dagger. Carrying one in your pocket is legal. The moment you open the blade and lock it into the fixed position, however, that same knife becomes a stabbing weapon under the statute.2California Legislative Information. California Code PEN 16470 – Definition of Dirk or Dagger The locked blade gives it the same rigid stability as any fixed-blade knife.
So a closed folder in your pocket is fine. The same folder with the blade locked open and slipped back into your pocket is a potential felony. The distinction is mechanical, and it is strict.
What “Concealed on the Person” Means
To convict you under PC 21310, prosecutors have to prove you carried a dirk or dagger and that it was concealed on your body. A knife is concealed when an ordinary observer cannot readily identify it as a knife through normal observation. Tucking a knife inside a waistband, sliding it into a pocket, or hiding it under a shirt all qualify.1California Legislative Information. California Code PEN 21310 – Carrying Concealed Dirk or Dagger
Concealment does not have to be total. A handle poking out of a pocket while the blade is hidden can still count. The knife also does not have to touch your skin. A dirk or dagger inside a backpack you are wearing is on your person for purposes of the statute.
Knives in Vehicles
The statute reaches knives carried “upon the person.” A fixed-blade knife stored in your glove compartment, center console, or trunk is generally not on your person. The prohibition kicks in when you take it out of the vehicle and conceal it on yourself. This differs from California’s concealed firearm rule, which separately criminalizes having a hidden handgun inside a vehicle you control.3California Legislative Information. California Code PEN 25400 – Carrying Concealed Firearm
The Sheath Rule That Keeps Carry Legal
Penal Code 20200 is the clearest safe harbor for people who need to carry a fixed-blade knife. A knife worn in a sheath that hangs openly from the waist is not concealed under PC 21310.4California Legislative Information. California Code PEN 20200 – Knife Carried in Sheath The key word is “openly.” The sheath has to be visibly suspended from your waist where anyone nearby can see it.
Visibility needs to stay unobstructed. If a jacket, long shirt, or coat drapes over the sheathed knife, the weapon is no longer openly worn, even if you did not mean to hide it. A legal carry in July can become an illegal one in October when you throw on a coat. People who carry sheathed knives for work should keep that in mind.
Penalties if You’re Convicted
Because PC 21310 is a wobbler, the sentencing range depends on how prosecutors charge the case. That decision usually turns on your criminal history, the circumstances of the arrest, and whether any aggravating factors were present.
Misdemeanor
A misdemeanor conviction carries up to one year in county jail.1California Legislative Information. California Code PEN 21310 – Carrying Concealed Dirk or Dagger The statute does not set a specific fine, so courts can impose up to $1,000 under the general misdemeanor fine provision.5California Legislative Information. California Code PEN 672 – Fines When Not Prescribed First-time offenders without aggravating circumstances often receive summary probation instead of jail.
Felony
A felony conviction is served in county jail rather than state prison under California’s realignment structure. The sentencing triad is 16 months, two years, or three years.6California Legislative Information. California Code PEN 1170 – Sentencing Courts can also impose a fine of up to $10,000.5California Legislative Information. California Code PEN 672 – Fines When Not Prescribed Formal probation is sometimes available at the felony level, with stricter terms and regular check-ins with a probation officer.
Collateral Consequences of a Felony
The sentencing numbers are not the whole picture. A felony conviction under PC 21310 triggers a lifetime ban on owning or possessing firearms in California. Penal Code 29800 prohibits anyone convicted of any felony from buying, receiving, or having a firearm, and violating that ban is itself a separate felony.7California Legislative Information. California Code PEN 29800 – Person Convicted of Felony Prohibited From Possessing Firearm For anyone who owns guns or relies on firearms at work, that consequence often matters more than the jail time.
A felony record can also affect professional licensing, employment, and housing applications long after any sentence is served.
If You’re Not a U.S. Citizen
The immigration impact of a PC 21310 conviction is less severe than many people fear. Because a dirk or dagger is not a firearm or destructive device, the conviction does not trigger the federal firearms deportation ground. It is also generally not classified as an aggravated felony, a crime involving moral turpitude, or a crime of violence under federal immigration law. A PC 21310 conviction standing alone typically does not lead to deportation or a bar on future immigration benefits. Any criminal conviction can still complicate a specific case, so non-citizens should get immigration-specific legal advice before accepting a plea.
Common Defenses
A few defenses come up regularly, and some work better than people expect.
- You did not know the weapon was there. If someone handed you a bag containing a hidden knife and you had no idea, that lack of knowledge can defeat the charge. Prosecutors generally have to show you were aware you were carrying a weapon.
- The item is not a dirk or dagger. Not every knife qualifies. A blade too short or flimsy to serve as an effective stabbing weapon may fall outside the statutory definition.
- The weapon was not concealed. If the knife was visible and not hidden by clothing or other items, the concealment element fails. The sheath rule under PC 20200 is the most common version of this argument.4California Legislative Information. California Code PEN 20200 – Knife Carried in Sheath
- Illegal search. If police found the knife through an unlawful search or during a stop that violated your Fourth Amendment rights, the evidence can be suppressed. Without the knife, the prosecution’s case usually collapses.
The strongest defenses often combine more than one of these arguments. A defense attorney will look at both the stop itself and the physical characteristics of the weapon.
Who Is Exempt
PC 21310 opens with an exemption clause pointing to a chapter of the Penal Code starting at Section 17700.1California Legislative Information. California Code PEN 21310 – Carrying Concealed Dirk or Dagger Under Penal Code 17730, peace officers employed by any federal, state, county, or city law enforcement agency are exempt while on duty, as long as the agency authorizes the possession and it falls within official duties.8California Legislative Information. California Code PEN 17730 – Peace Officer Exemptions The exemption does not cover off-duty carry unless separately authorized. If you are not a peace officer acting in your official capacity, assume the statute applies to you.