Antigua and Barbuda ăntē´gə, –gwə, bärbu´də [key], independent Commonwealth nation (2005 est. pop. 68,700), 171 sq mi (442 sq km), West Indies, in the Leeward Islands. It consists of the island of Antigua (108 sq mi/280 sq km) and two smaller islands, the more sparsely populated Barbuda (62 sq