Ghana, officially the Republic of Ghana, is a unitary presidential constitutional democracy, located along the Gulf of Guinea and Atlantic Ocean, in the subregion of West Africa. Ghana means “Warrior King" in the Soninke language. Ghana's population of approximately 28 million spans a variety of ethnic, linguistic and religious groups. Five percent of the population practices traditional faiths, 67.2% adhere to Christianity and 23.6% are Muslim. Its diverse geography and ecology ranges from coastal savannahs to tropical rain forests.