When Alexander Neely Sloan was born on 3 August 1822, in Belleview Township, Washington, Missouri, United States, his father, Thomas I Sloan, was 37 and his mother, Catherine B Neeley, was 38. He married Mary Elizabeth Wiatt in 1841, in Missouri, United States. They were the parents of at least 4 sons and 5 daughters. He lived in Iron Township, Iron, Missouri, United States in 1860 and Jackson Township, Reynolds, Missouri, United States in 1880. He died on 27 November 1899, in Ellington, Reynolds, Missouri, United States, at the age of 77, and was buried in Ellington, Reynolds, Missouri, United States.