Federal law bans interstate commerce in switchblade knives. The only exemption to this federal ban is direct sale to government agencies by manufacturers. The first was New Jersey, in 1956, followed quickly by New York. For example, an 1860s law bans sailors on U.S. flag merchant ships from wearing fixed blade sheath knives while aboard ship. These are abridged extracts ONLY from those state laws explicitly mentioning knives.
Most states have additional laws regarding the use of weapons in the commission of crimes.
The laws collected here are only those in which possession or carry of a knife is the only crime. Some cities or counties may have additional or more restrictive local laws. It does not mean that the state has no knife laws, but only that I cannot find any. Click HERE to learn more.