Andrewsiphius is an extinct remingtonocetid early whale known from the Eocene (Lutetian, 47.8 to 41.2 million years ago) of Gujarat and Kutch, India and Balochistan, Pakistan.

Sahni & Mishra 1975 described two new species, Andrewsiphius kutchensis and A. minor based on their previous material and new mandibular fragments.

[6] Sahni & Mishra 1972 named the type species for Dr Robert E. Sloan, Department of Geology, University of Minnesota.

[7] Andrewsiphius is similar to but smaller than Kutchicetus (another remingtonocetid); Gingerich et al. 2001 synonymized them, and Thewissen & Bajpai 2009 proposed a new subfamily, Andrewsiphiinae, for the two species.

Andrewsiphius and Kutchicetus share several characteristics not present in other remingtonocetids: an elongated snout that is higher than it is wide; foramina (small holes) on the tip of the snout suggesting the presence of whiskers; eyes located dorsally near the cranial midline, resulting in an appearance of a mammalian crocodile; and a very large sagittal crest overhanging the back of the skull.