Madheshi people is a term used for several ethnic groups living in the central and eastern Terai region of Nepal. It has also been used as a political pejorative term by the Pahari people of Nepal to refer to non-pahari people with a non-Nepali language as their mother tongue, regardless of their place of birth or residence. The term Madheshi became a widely recognised name for Nepali citizens with an Indian cultural background only after 1990. Madheshi people comprise various cultural groups such as Hindu caste groups, Muslims, Marwaris, Brahmin and Dalit caste groups, ethnic groups like Maithils, Bhojpuri, Awadhi and Bajjika speaking people and indigenous people of the Terai. Many of these groups share cultural traditions, educational and family ties with people living south of the international border in Bihar, Uttar Pradesh and West Bengal. Tharu people and Pahari people living in the Terai do not consider themselves as Madheshi. In recent times, some politicians and journalists use the term for all Nepali citizens of the Terai.

The Pahadi people are an indigenous group of the Himalayas. Most Indo-Aryan Paharis, however, identify as members of constituent subgroups and castes within the larger Pahari community such as Brahmin, Kshatriya and Dalits.