When Benjamin Franklin Auxier was born in March 1796, in Virginia, United States, his father, Abraham M. Auxier, was 29 and his mother, Nancy Ann Harris, was 18. He married Elizabeth Standefer on 13 April 1819, in Illinois, United States. They were the parents of at least 4 sons and 3 daughters. He died on 4 February 1867, in Hamilton, Illinois, United States, at the age of 70, and was buried in Dahlgren, Hamilton, Illinois, United States.