The high rate of economic growth, the provision of basic facilities, and job creation are products of any nation’s level of industrialisation. Globally, no nation is considered to have attained a concerted level of a high standard of living in the absence of economic development. However, Nigerian industrialisation has continued on a downward journey in the 21st century despite several industrial development policies. The paper is an attempt to find out how industries have fared and challenges facing their development in Nigeria in the 21st century. It is also an effort to unearth whether UNIDO has influenced Nigeria industrial development. The study adopted a descriptive research design and documentary data analysis method to elucidate the fact that the UNIDO supports have not significantly impacted industrialisation in Nigeria. The adoption of Top-Down as a theoretical model of analyses has validated the fundamental issues raised, informed the findings and subsequent recommendations of this paper. تفاصيل المقالة