Dasna is located at . It has an average elevation of 207 metres (679 feet).
India census, Dasna had a population of 24,428. Males constitute 54% of the population and females 46%. Dasna has an average literacy rate of 45%, lower than the national average of 59.5%: male literacy is 56% and, female literacy is 32%. In Dasna, 22% of the population is under 6 years of age.