 The population was 12,021 at the 2010 census.The original village, which eventually became known as Amherst, was established/founded by pioneer settler Josiah Harris  (who relocated to this area about 1818), although the original tiny village was first known only as "Amherst Corners" in the early-1830s.When the village-plat was officially recorded in 1836, it was simply named the "town plat of Amherst", but became "Amherstville" circa-1839, and was later changed to "North Amherst", until finally again simply 'Amherst' in 1909.