‘The First Comic Papers Published in America’ appeared in Printers’ Ink, Vol. 6, No. 1, 1892. F. Armoy Knox was, along with Canadian Alexander E. Sweet, the founder of the comic paper Texas Siftings.
Printers’ Ink was a trade paper started in 1888. Cover artist Chip Bellew was the son of Frank Bellew, mentioned in the article below.
Last I post an ad (Printers’ Ink, Vol. 18, 1897) for a 12-page color comic supplement provided by Truth magazine, the paper where Outcault’s ‘Hogan’s Alley’ (with his Yellow Kid) had its first publication. Bill Blackbeard noted of Truth that “there is only one hard copy file in the US (NYPL) and no microfilm.” Richard Samuel West has written a long informative article on Truth HERE.
See also ‘Comic Periodicals of America’ HERE for a differing view of the ‘first’ comic paper in America.