Zoology department of Cotton College was started in May, 1940 by introducing the subject in I.Sc. class. Dr. K. N. Sarma was the founder Head of the Department. In Graduate level, the subject was introduced as Pass Course in B.Sc. in 1947. The Honours Course of Zoology in B.Sc. was introduced in 1953. The Post-Graduate Course under Gauhati University was started in 1974. The Laboratories of the department have been recognized by Gauhati University for carrying out Ph.D. research. Zoology department has received the financial assistance from DST, Govt. of India under its ‘Fund for Infrastructure Development in Science & Technology in Higher Educational Institution (FIST)’ programme. The department has also been receiving financial assistance from the UGC since 2008-09 under the scheme ‘Rejuvenation of Basic Scientific Research in Indian Universities/PG Colleges’.