Acadia National Park is a National Park located in the U.S. state of Maine. It reserves much of Mount Desert Island, and associated smaller islands, off the Atlantic coast. Originally created as Lafayette National Park in 1919,the first National Park East of the Mississippi,it was renamed Acadia in 1929.The landscape architect Charles Elliot is credited with the idea for the park.It first attained federal status when President Woodrow Wilson, established it as Sieur de Monts National Monument on July 8, 1916, administered by the National Park Service.