As of 2001 census of India, the population under Mokokchung Municipal Council (excluding the colonies beyond Sungkomen Ward) had a population of 31,204. The actual population is 41,746 (including Yimyu ward which was incorporated into Mokokchung proper in 2003, i.e. after the last census in 2001). Its metropolitan agglomeration has a population of 60,161. Males constitute 55% of the population and females 45%. Mokokchung has the highest literacy rate in the state with an average literacy rate of 84%, far above the national average of 59.5%: male literacy is 84%, and female literacy is 83%. 11% of the population is under 6 years of age.
