Acadia (in the French language Acadie) was a colony of New France, in northeastern North America that included parts of eastern Quebec, the Maritime provinces, and modern-day Maine to the Kennebec River.
Today, Acadia is used to refer to regions of North America that are historically associated with the lands, descendants, and/or culture of the former French region. It particularly refers to regions of The Maritimes with French roots, language, and culture, primarily in New Brunswick, Nova Scotia, the Magdalen Islands and Prince Edward Island, as well as in Maine. It can also be used to refer to the Acadian diaspora in southern Louisiana, a region also referred to as Acadiana. In the abstract, Acadia refers to the existence of a French culture in any of these regions.
Wikipedia Entry for Acadie