What Countries Share The Same Island?
What Countries Share The Same Island? Rank Island Name Countries 1 New Guinea Indonesia, Papua New Guinea 2 Borneo Indonesia, Malaysia, Brunei 3 Ireland Ireland, United Kingdom 4 Hispaniola Dominican Republic, Haiti How many countries share an island? Island Area Countries / Territories Ireland 84,421 km2 United Kingdom (Northern Ireland) Hispaniola 76,192 km2Dominican Republic Haiti