!Itanagar Itanagar is a town in the state of Arunachal Pradesh in India. It has been the capital of Arunachal Pradesh since 20th April 1974. This town is situated at the foothills, 350 metres above mean sea level. It comes administratively under Papumpare district. There is a historical fort called Itafort, dating back to the 14-15 centuries. Itanagar has been identified with Mayapur, the capital of the 11th century AD Jitri dynasty.