Yearly % Change: For 2025: percentage change in total population over the last year (from July 1, 2024 to June 30, 2025). For all other years: latest year annual percentage change equivalent assuming homogeneous change in the preceding five year period, calculated through reverse compounding.
Yearly Change: For 2025: absolute change in total population (increase or decrease in number of people) over the last year (from July 1, 2024 to June 30, 2025). For all other years: erage annual numerical change over the preceding five year period.
Migrants (net): The erage annual number of immigrants minus the number of emigrants over the preceding five year period (running from July 1 to June 30 of the initial and final years), or subsequent five year period (for 2016 data). A negative number means that there are more emigrants than immigrants.
Median Age: age that divides the population into two numerically equal groups: half of the people are older than the median age indicated and half are younger. This parameter provides an indication of age distribution.
Fertility Rate: (Total Fertility Rate, or TFR), it is expressed as children per woman. It is calculated as the erage number of children an erage woman will he during her reproductive period (15 to 49 years old) based on the current fertility rates of every age group in the country, and assuming she is not subject to mortality.
Density (P/Km²): (Population Density) Population per square Kilometer (Km²).
Urban Pop % : Urban population as a percentage of total population.
Urban Population: Population living in areas classified as urban according to the criteria used by each country.
Country's Share of World Pop: Total population in the country as a percentage of total World Population as of July 1 of the year indicated.
World Population: Total World Population as of July 1 of the year indicated.
Global Rank: Position held by Nigeria in the list of all countries worldwide ranked by population (from the highest population to the lowest population) as of July 1 of the year indicated.