You can drive in St. Lucia with a US license, but it is not sufficient on its own for legal operation. Visitors are required to obtain a temporary St. Lucian driving permit. As of 2026, the fee is approximately US$22. You can obtain this permit at the airport upon arrival (at the immigration or transport desk), at a local police station, or through most reputable car rental agencies. You must present your valid US license and passport. It is also vital to remember that St. Lucia follows British driving rules, meaning you must drive on the left-hand side of the road. Many roads on the island are steep and winding with sharp hairpin turns, so local authorities recommend a 4WD vehicle if you plan to explore rural areas or the interior rainforest.