When Colonel Peter Gansevoort was born on 17 July 1749, in Albany, Albany, New York, United States, his father, Harman Gansevoort, was 37 and his mother, Magdalena Douw, was 30. He married Catharina Van Schaick on 12 January 1778, in Albany, Albany, New York, United States. They were the parents of at least 5 sons and 1 daughter. He died on 11 July 1812, in his hometown, at the age of 62, and was buried in Albany Rural Cemetery, Menands, Colonie, Albany, New York, United States.