G. Udayagiri is a town in Kandhamal district of the eastern state of India, Orissa.

As per the 2001 India census report, G. Udayagiri had a population of10, 206 inhabitants. Males constitute 49% of the population and females comprise 51% of the population. In G.Udayagiri, 12% of the population is less than six years of age. G.Udayagiri has an average literacy rate of 74%, which is quite higher than the national average literacy rate of 59.5%. The male literacy rate is 81% and the female literacy rate is 74%.