Rensselaer Gansevoort was the son of Leonard Gansevoort, whose ancestry was among the early Dutch settlers of Albany. Rensselaer was born in Greenbush, opposite Albany, in 1803. He entered Union College where he graduated in 1819, receiving the degree of bachelor of arts. Shortly afterwards he began the study of medicine under the direction of Dr. Platt Williams, and attended lectures at the College of Physicians and Surgeons, in New York city, from which institution he received his medical diploma in 1826. Dr. Gansevoort commenced practice in Bethlehem, but at the expiration of one or two years returned to Albany and entered into business with Dr. Vernor Cuyler. In 1831, he went to New Orleans, and soon removed up the river to Donalsonville, where he died in 1838, at the age of thirty-five years. Dr. Gansevoort was a gentleman, of fine personal appearance, and well educated in his profession.