LewistonThrills.com . . . The Town of Lewiston was organized on February 27, 1818... Population as of 2000: 16,257. Lewiston had been originally controlled by the French, later by the British, and ultimately became a part of the United States. 62% percent of the Canadian and 50% of the U.S. population reside within a 500-mile radius of Lewiston.