The Newah or Newar (/nɪˈwɑːrz/; Newar:नेवार) are the historical inhabitants of the Kathmandu Valley and its surrounding areas in Nepal, and the creators of its historic heritage and civilization.

The valley and surrounding territories constituted the former Newar kingdom of the Nepal Mandala. Unlike a common-origin ethnic group, Newars are a good example of a nation-community with relic-identity of a previously existing country. Newar community within it consists of various strands of ethnic, racial, caste and religious heterogeneity, as Newars of today are descendants of the diverse group of people that have lived in Nepal Mandala since prehistoric times. Indo-Aryan immigrants like the Licchavis and Mallas that arrived at different periods eventually merged with the local indigenous Newar population by adopting their language and customs. These immigrants retained their Indic heritage and brought with them their Sanskritic languages, social structure, Vedic religion and culture which has profoundly altered the history of Newar civilization. Newar rule in Nepal Mandala ended with its conquest by the Gorkha Kingdom in 1768.