When Aaron L. Mills was born on 19 November 1812, in Jefferson, Tennessee, United States, his father, Seth Mills, was 30 and his mother, Charity Thornburg, was 22. He married Amelia Samuels on 14 October 1832, in Wayne, Indiana, United States. They were the parents of at least 5 sons and 4 daughters. He lived in White River Township, Washington, Arkansas, United States in 1850. He died on 3 January 1852, in Little Rock, Pulaski, Arkansas, United States, at the age of 39, and was buried in Carter, Washington, Arkansas, United States.