Remingtonocetus is an extinct genus of early cetacean freshwater aquatic mammals of the family Remingtonocetidae endemic to the coastline of the ancient Tethys Ocean during the Eocene.

Sahni & Mishra 1975 named Protocetus harudiensis based on a partial skeleton, the type specimen found in the Lutetian shallow subtidal mudstone in the Harudi Formation, India.

Kumar & Sahni 1986 renamed it Remingtononocetus harudiensis due to morphological differences from Protocetus.

[2] Remingtonocetus domandaensis was named by Gingerich et al. 2001 based on a partial skeleton found in a Lutetian coastal shale in the Domanda Formation of Pakistan.

Based on a morphological analysis, they concluded that the hindlimbs of Remingtonocetus were probably not weight-bearing, and that (1) the fused sacrum indicates a limitation in tail-powered locomotion, and (2) the presence of powerful hip extensors and femoral adductors indicates that Remingtonocetus was an efficient and specialized foot-powered swimmer.