Newton "Jack" Daniel (September 5, 1846 – October 10, 1911) was an American distiller and the founder of Jack Daniel's Tennessee whiskey distillery.

Daniel was the youngest of ten children born to Calaway and Lucinda (née Cook) Daniel. Jack Daniel's paternal grandparents immigrated to America in the late 18th century. His grandfather Joseph “Job” Daniel was born in Wales, while his grandmother, Elizabeth Calaway, was born in Scotland. He was of Welsh, English, Scots-Irish and Scottish descent.

His mother died shortly after his birth, most likely due to complications from the childbirth.[ He was the youngest of his parents' 10 children, and on June 26, 1851, his father remarried and then had another three children with his stepmother Matilda Vanzant.

The company that now owns the distillery claims that it was first licensed in 1866. However, in the 2004 biography Blood & Whiskey: The Life and Times of Jack Daniel author Peter Krass maintains that land and deed records show that the distillery was actually not founded until 1875.

Since Daniel never married and did not have any children, he took his favorite nephew, Lem Motlow, under his wing. Motlow had a head for numbers and was soon doing all the distillery's bookkeeping. In 1907, due to failing health, Daniel gave the distillery to his nephew.