Christmas trees were added to the U.S. agricultural census in 1997. According to the 2002 census taken by the USDA, nearly 22,000 U.S. farms grow evergreen trees for the purpose of cutting for Christmas tree sales. In that census, the top three states for Christmas tree production were Oregon, North Carolina, and Michigan, respectively.
https://teachbesttech.org/best-fiber-optic-christmas-tree/