Mid-America
/mɪdəˈmɛrɪkə/noun
1The middle part of the United States, especially the Midwest.
2The geographical region comprising Central America, Mexico, and the Antilles; the central part of the land mass of the American continents.
Origin
Mid 19th century; earliest use found in Theodore Winthrop (1828–1861). From mid + the name of America.