Yes. At the federal level, there are no laws prohibiting the ownership of katana in the United States. Katana are legal to purchase, own, and display in all 50 states for adults 18 and older. However, publicly carrying a katana is regulated differently by state — for example, California and New York have stricter rules on carrying bladed weapons in public. We recommend transporting your sword in a secure case. For a detailed state-by-state breakdown, see our full guide: Are Katanas Legal in the US?