"Ibid" is a parody by American horror fiction writer H. P. Lovecraft, written in 1927 or 1928, and first published in the January 1938, issue of O-Wash-Ta-Nong.

"Ibid" is a mock biography of the Roman scholar Ibidus (486–587), whose masterpiece was Op. Cit., "wherein all the significant undercurrents of Graeco-Roman thought were crystallized once and for all." The piece traces the skull of Ibidus, once the possession of Charlemagne, William the Conqueror and other notables, to the United States, where it travels via Salem, Massachusetts and Providence, Rhode Island to a prairie dog hole in Milwaukee, Wisconsin.