When August Bentz was born on 12 September 1898, in South Dakota, United States, his father, Heinrich Jakob Bentz, was 37 and his mother, Eva Schaeffer, was 34. He married Laura Mohr on 7 November 1920, in McPherson, South Dakota, United States. They were the parents of at least 4 sons and 2 daughters. He lived in Dawson, Montana, United States in 1935 and Yellowstone, Roanoke, Virginia, United States in 1974. He died on 11 January 1974, in Billings, Yellowstone, Montana, United States, at the age of 75.