Why Is Nigeria So Populous? Drivers of Africa's Largest Population

Nigeria: 220+ Million (2024 Est.) – 6th World, 1st Africa

Nigeria's population explosion stems from a classic demographic transition lag: death rates fell fast, birth rates remain high.

TFR (Total Fertility Rate): ~5.1 children/woman (2023) – down from 6.5 (1990) but still high.
Drivers: Low contraceptive prevalence (~17% modern), desire for large families (economic security, old-age support), religious pro-natalism (Muslim North, Christian South).

Median age at first marriage: ~18–20 (women, North); ~22–24 (South).
Child marriage: 30%+ girls married <18 (North). Extends reproductive window.

Unmet need: ~20% married women want spacing/limiting but lack access.
Barriers: Cost, distance, stockouts, provider bias, cultural/religious opposition, male gatekeeping.

Children = Wealth/Status: "Omo nla" (many children) = blessing, labor, lineage continuity.
Son Preference: Drives continued childbearing until male heirs.
Polygyny: ~30% marriages (North) → higher aggregate fertility.

Life Expectancy: 55 (2023) up from 37 (1960).
Child Mortality: <5 mortality dropped ~120/1000 (1990) → ~110/1000 (2023) – still high but improving.
Vaccines, ORS, bed nets, primary care expanded.

Youthful Structure: 43% <15 years. Even if TFR dropped to 2.1 tomorrow, population grows for decades as huge cohorts enter reproductive age.

Zone	TFR	CPR (Modern)	Key Factors
North West / North East	6.5–7.5	5–10%	Early marriage, low education, Islamic tradition, insecurity
North Central	4.5–5.5	15–20%	Mixed
South West	3.5–4.5	25–35%	Yoruba, higher education, urban
South East / South South	3.5–4.5	20–30%	Igbo/Niger Delta, Christian, urbanizing

Demographic Dividend? Only if massive job creation, education, health investment match youth bulge.
Risks: Unemployment, instability, resource stress, urban slums, migration pressure.

Nigeria's population is its greatest asset or liability—depending on whether it invests in human capital now.

Africa