Kubbar (Arabic: جزيرة كبر) is a sandy island of Kuwait in the Persian Gulf, covered with shrub. It is located roughly 30 kilometers off the southern coast of Kuwait and 29 kilometres off the coast of Failaka. The island is nearly circular, with a diameter of 370 to 380 meters, corresponding to an area of about 11 ha. It is sandy, with low coasts and sparsely vegetated. The island is inhabited by various forms of wildlife.
Around six Iraqi soldiers killed in the Gulf War of 1991 lie buried on the island. Their graves are marked discreetly, in the Islamic manner.