Demographics of Nigeria The total population of Nigeria is 195,875,237 people. In Nigeria, the population density is 193 people per square kilometer (502 per square mile). Because of this statistic, this country is considered to be densely populated. The ethnic diversity is very diverse according to a fractionalization scale which for Nigeria is 0.8505. Nigeria has approximately 1199115 foreign immigrants. The median age is approximately 18.2 years. In Nigeria, 32.88 in every 100 people use internet. Nigeria has a Human Development Index (HDI) of 0.504. https://www.confiduss.com/en/jurisdictions/nigeria/demographics/