Delhi-National Capital Region (NCR) is an economic development-based region conceived to absorb the huge migration into Delhi and accommodate employment requirements and civic necessities. It is a planning region with a cumulative economy of USD 370 billion and pulls in nearly a quarter of India’s total foreign direct investment. The role of agglomeration effects and the economy of scale is pivotal in shaping this region as an economic hub. Although the service sector-related activities constitute a staggering 66% of its total GDP, only 26% is contributed by the NCR’s secondary sector. This secondary sector is a large employer in the region and has huge potential and scope for further development. This review paper explores the literature related to the changing nature and pattern of the industrial sector, which comprises of approximately 17% and 6% of the total economy of the NCR and Delhi, respectively. It also intends to assess the infrastructure, migration, and income types and patterns; the current status of industries; and growth and its role in employment generation in the region. There is a need to replace conventional polluting industries with more technological skill-based industries. This paper peers through the policy domain and identifies the lacunas that are hindering the potential growth of the industrial sector in this planning region.