When Harvey Dillon Van Vleck was born on 11 February 1852, in Savannah, Savannah, Wayne, New York, United States, his father, Lawrence Van Vleck, was 34 and his mother, Prudence Ann Hughs, was 35. He married Jennie E. Cool about 1871, in Wayne, New York, United States. They were the parents of at least 2 sons and 1 daughter. He lived in New York, United States in 1870 and Wolcott, Wolcott, Wayne, New York, United States in 1900. He died on 29 August 1919, in Butler, Wayne, New York, United States, at the age of 67, and was buried in Butler, Wayne, New York, United States.