Chicago Knife Laws
Chicago bars carrying any knife with a blade longer than two and a half inches, and the ban is tighter again within a set distance of a school or a public assembly.. The state law underneath it still applies, and Illinois has no statewide preemption, which is the only reason the city is allowed its own rule at all.
This is not legal advice, and we are not lawyers. It is a plain reading of published summaries and the statutes they cite, kept current on a fixed schedule. Local ordinances are frequently stricter than state law and are not all captured here. Check the statute, and check your city, before you carry.
Chicago knife law at a glance
| The city rule | Chicago bars carrying any knife with a blade longer than two and a half inches, and the ban is tighter again within a set distance of a school or a public assembly. |
|---|---|
| The city ordinance | Chicago Municipal Code 8-24-020 — read it |
| Illinois state law underneath it | No statewide blade length. Chicago bars any knife with a blade longer than two and a half inches. |
| Automatic knives | A valid Firearm Owner’s Identification card is an exception to the switchblade restriction. |
| State preemption | No. Local ordinances stand, and Chicago’s is stricter than the state’s. |
Source last revised 4 July 2023
Next review 15 November 2026
Common questions about Chicago knife laws
Why is the city rule stricter than the state one?
Illinois has no statewide knife preemption. Preemption is the provision that reserves knife law to the legislature and stops a city writing its own. Where a state has it — Texas and Arizona both do — a city ordinance cannot add a blade length of its own, which is why Houston and Phoenix do not need a page like this one. Where a state does not have it, the city rule is usually the one that will catch you, because it is tighter and because it is the one nobody reads.
Is it illegal to carry a pocket knife in Chicago?
Not in itself. It becomes unlawful when the blade goes over the city limit above, when the knife is of a type the state restricts, or when you carry it somewhere knives are barred outright. Read the city ordinance and the state statute together; neither one on its own gives you the answer.
Does the state law still apply inside the city?
Yes. The city ordinance sits on top of the state code, it does not replace it. You have to satisfy both.
Where this comes from
Two independent sources, cross-checked against each other, and the statute text where they disagree. The automatic knife column is the American Knife and Tool Institute’s state automatics table, checked against Knife Rights’ own switchblade legality table and their legislative update log. Everything on a state page is quoted or closely tracked from that state’s AKTI page, and we print the date AKTI last revised it so you can see for yourself how fresh the underlying work is.
Where a source is older than a change we know about, we say so on the page rather than quietly leaving the old answer up. That is the whole reason this is checked every two months.
Elsewhere on Popular EDC
Illinois knife law in full, the map for all fifty states, and every Popular EDC tool in one place.
Data updated September 2026. Checked against the published sources on 15 September 2026, and due for review again on 15 November 2026.