INTRO : Population density refers to “the number of persons per square kilometer of land,” calculated as Total Population ÷ Land Area (Britannica). Nigeria’s estimated density is about 96 persons/km², but distribution is uneven, with areas of high density above this figure and others below it. High population density occurs when many people live in a relatively small area, often driven by social, economic, and environmental factors. Nigeria, with “over 200 million people living in a relatively small land area,” is among Africa’s most densely populated nations. This article outlines five reasons for high population density in Nigeria , drawing on academic and public discourse as follows: 1. Industrialisation and Employment Opportunities: One major reason for high population density in Nigeria is the concentration of industries. Cities like Lagos, Ogun, and Kano “provide many job opportunities in factories, offices, and businesses,” attracting migrants seeking work. Industries pul...