The Dimasa Kingdom was a late medieval/early modern kingdom in Assam, Northeast India ruled by Dimasa kings. The Dimasa kingdom and others that developed in the wake of the Kamarupa kingdom were examples of new states that emerged from indigenous communities in medieval Assam as a result of socio-political transformations in these communities. The British finally annexed the kingdom: the plains in 1832 and the hills in 1834. This kingdom gave its name to undivided Cachar district of colonial Assam. And after independence the undivided Cachar district was split into three districts in Assam: Dima Hasao district, Cachar district, Hailakandi district. The Ahom Buranjis called this kingdom Timisa.

The Chutia people are an ethnic group that are native to Assam and historically associated with the Chutia kingdom. However, after the kingdom was absorbed into the Ahom kingdom in 1523–24, the Chutia population was widely displaced and dispersed in other parts of Upper Assam as well as Central Assam. They constitute one of the core groups that form the Assamese people.