Though its author is disputed, with the poem being attributed to both Clement Clarke Moore and Henry Livingston Jr. over the years, it was definitely first published on Dec. 23, 1823 in the Troy Sentinel newspaper in upstate New York. It is also referred to as “A Visit From St. Nicholas” or “The Night Before Christmas.”

https://www.huffpost.com/entry/twas-the-night-before-christmas_n_801194