Yes, in 2026, all international travelers—including citizens of the U.S., UK, and Canada—require a valid passport to enter Grenada. The passport must generally be valid for at least six months beyond your date of departure. While Grenada is part of CARICOM, the "Western Hemisphere Travel Initiative" rules mean that even U.S. citizens arriving by air cannot use just a driver's license or birth certificate; a full passport book is required. If arriving by sea on a "closed-loop" cruise (beginning and ending at the same U.S. port), U.S. citizens might technically be able to use a passport card or birth certificate, but a passport book is still highly recommended for any emergencies. Most visitors from major Western nations are granted a 90-day visa-free stay upon arrival, provided they have a return ticket and proof of accommodation.