Charles Atwood Kofoid (11 October 1865 – 30 May 1947) was an American zoologist known for his collection and classification of many new species of marine protozoans which established marine biology on a systematic basis. Kofoid also wrote a volume on the biological stations of Europe. In 1920, Kofoid and US zoologist Olive Swezy (1873-1968), published Pavillardia Kof. & Swezy 1920 (a genus of dinoflagellates) in Univ. Calif. Publ. Zool. pages 323-324. It was named in honour of . In 1929, botanist Pavillard first described Kofoidinium, which is a genus of dinoflagellates belonging to the family .