John Isaac De Graff was born in Schenectady, NY on October 2, 1783. Following his elementary and high school education he attended Union College, Schenectady, NY. It is not known if he graduated. During the War of 1812 he served in the U.S. Armed Forces.
In 1826 he was elected to the 20th U.S. Congress as a Jacksonian. He served from March 1827 to March 1829. From 1832 to 1834 he served as mayor of Schenectady, NY.
He ran again for the U.S. Congress in 1836, was elected to the 25th U.S. Congress and served from March 1837 to March 1839. He decided not to run for another term.
He engaged in mercantile pursuits and was involved in the building of the Mohawk and Hudson Railroad. He was also involved in banking. He again served as mayor of Schenectady from 1842 to 1845.
John Isaac De Graff passed away on July 26, 1848 at the age of 64 in Schenectady, NY. He was interred in Vale Cemetery, Schenectady, NY
Various Web sites including: bioguide.congress.gov, house.gov, famousamericans.net and wikipedia.org.
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