1 | Page Diversification strategy and organization market share in the Nigerian manufacturing industry By Oluwakemi O. Oyefesobi, PhD. S.O. Akintunde Suraju A. Aminu, PhD. Abstract Most firms in the manufacturing industry jostle for sales and customer patronage so as to maintain a positive market position or to remain in a vantage market position in their industries. The reason for this is that most firms operate in a stiff competitive business environment, especially in the manufacturing industry. This study is aimed therefore to find out how manufacturing firms can make use of a diversification strategy to increase their market share. This study made used of a survey design; the questionnaire was the research instrument used. ANOVA and correlation were used as statistical tools of analysis. The findings revealed that diversification has a positive impact on manufacturing firm market share and market position. The study concluded that diversification enables firms to expand their operations by adding markets and products to existing businesses. The study then recommended the use of diversification as a strategy for firms that intend to increase their market share. Keywords: Diversification, Market-Share, Market Position, Strategy, Profitability and Sales Volume. This article should be cited as: Oyefesobi, O. O., Akintunde, S. O., & Aminu, S. A. (2017). Diversification strategy and organization market share in the Nigerian manufacturing industry. Ilorin Journal of Management Science, 4(1), 19-31.