Remingtonocetidae is a diverse family of early aquatic mammals of the order Cetacea, endemic to the coastline of the ancient Tethys Ocean during the Eocene (present-day Pakistan and India). Living from 55.8—48.6 mya, they existed for approximately 7.2 million years. The name of the family was derived from the genus Remingtonocetus which was named after paleocetologist Remington Kellogg.