This paper focuses on vernacular architecture and the various vernacular architecture in existence in Nigeria. Nigeria as a country is heterogeneous in both its socio-cultural structure and ideological perspective because of its ethnic diversity. This study therefore examines the vernacular architecture of Nigeria with focus on the three major ethnic groups which are the Hausa’s in the Northern Nigeria having Hausa Vernacular Architecture, the Yoruba’s in the South-Western Nigeria having Yoruba Vernacular Architecture and the Igbo’s in the South-Eastern Nigeria having Igbo Vernacular Architecture with focus on their culture, region and identity in order to have a proper perspective on the vernacular architecture of Nigeria. The vernacular architecture of the different ethnic groups in Nigeria are reflected through their culture, region and identity. Ethnic groups with similar culture, region and identity share similar architectural characteristics as it relates to their building layout, size of family, space organization, openings and fenestration, decorations used, roofing type adopted as well as the nature of Building materials used. As such, this paper suggest the classification of the vernacular architecture in Nigeria be considered from the cultural, regional and identity aspect due to the environmental, cultural and historical background in which vernacular architecture exist.