No, U.S. Green Card holders do not need a visa to enter Aruba for stays of up to 30 days. Under Aruba's current Visa Exemption Policy, permanent residents of the United States are granted a "visa waiver" upon arrival at the airport in Oranjestad. To enter, you must present a valid passport from your country of citizenship, your original and valid U.S. Permanent Resident Card (Green Card), a completed Embarkation/Disembarkation (ED) card, and proof of an onward or return ticket. You may also be asked to provide proof of sufficient funds and a confirmed hotel reservation. While the initial stay is capped at 30 days, Green Card holders can apply for an extension of up to 180 days at the local immigration office once they are on the island.