Wow.... some of the posters above really need a map. The land mass known as North America contains all of Costa Rica (and part of Panama). Yes, it is in Central America, but North America includes EVERYTHING on the CONTINENTAL SHELF. The Continental Shelf is how various continents are decided... North America actually includes Canada, The USA, Mexico, All Central American Countries, almost all Carribean Islands, including the lesser antillies. So the simple answer: "Costa Rica is part of North America".