Fillmore is a hamlet (and census-designated place) in the town of Hume, Allegany County, New York, United States. As of the 2010 census it had a population of 603. It was originally known as "The Mouth of the Creek" but was named for President Millard Fillmore in 1850. The former village of Fillmore dissolved its incorporation and is now simply a named hamlet southeast of the town center of Hume.