Zadie Smith is an emerging British writer known for her treatment of race, ethnicity and culture in her novels. She explores the different minority groups within a multicultural society. She makes the readers realize the traumatic effects of migration. Smith has portrayed the positive and negative aspects of her immigrant characters and their experience. Race and ethnicity are one of the key terms in post colonial theory and cultural anthropology. The terms race and ethnicity are often used interchangeably but they have different meanings. Ethnicity or ethnic group is a term defined by their distinctive cultural attributes such as language and religion. On the other hand, race is understood by most people as a mixture of physical, behavioral and cultural attributes. Moreover, race is a physical difference, and ethnicity is a cultural difference. Race and Ethnicity cannot substitute for each other. Race cannot be replaced by ethnicity. This paper delves deep into Race and Ethnic disparity and impact of western culture in the novel White Teeth.