As of 2001[update] India census, Sagar Cantonment had a population of 35,872. Males constitute 52% of the population and females 48%. Sagar Cantonment has an average literacy rate of 72%, higher than the national average of 59.5%: male literacy is 77%, and female literacy is 66%. In Sagar Cantonment, 15% of the population is under 6 years of age.
In the elections which were held in January 2015, following have been elected as public representatives in the Cantonment Board - Ward No.1 - Mrs. Veena Chouksey, Ward No.2 - Mrs. Kiran Kesharwani, Ward No.3 - Mr. Jilani Mohammad Ali, Ward No.4 - Mr. Shekhar Choudhary, Ward No.5 - Mr. Vimal Yadav, Ward No.6 - Mr. Prabhudayal Patel, and Ward No.7 - Mr. Veerendra Patel.