Aroostook is the northernmost region and the largest county in Maine.
Cities in Aroostook county are Caribou and Presque Isle. Towns include Allagash, Amity, Ashland, Blaine, Bridgewater, Castle Hill, Caswell, Chapman, Crystal, Dyer Brook, Eagle Lake, Easton, Fort Fairfield, Fort Kent, Frenchville, Grand Isle, Hamlin, Hammond, Haynesville, Hersey, Hodgdon, Houlton, Island Falls, Limestone, Linneus, Littleton, Ludlow, Madawaska, Mapleton, Mars Hill, Masardis, Merrill, Monticello, New Canada, New Limerick, New Sweden, Oakfield, Orient, Perham, Portage Lake, Saint Agatha, Saint Francis, Sherman, Smyrna, Stockholm, Van Buren, Wade, Wallagrass, Washburn, Westfield, Westmanland, Weston and Woodland.