Nigeria covers 923,768 square kilometres on the Gulf of Guinea in West Africa, extending from a low Atlantic coast to the dry margins of the Sahel. It borders Benin to the west, Niger to the north, Chad across a short northeastern frontier near Lake Chad, and Cameroon to the east, while roughly 850 kilometres of coast face the Atlantic. Abuja, in the central Federal Capital Territory, is the political capital; Lagos remains the principal commercial metropolis. The Niger River enters from the northwest, meets the Benue at Lokoja and then divides through the Niger Delta before reaching the sea. South of the interior plateaus lie coastal plains, lagoons, mangrove swamps and rainforest; farther north the land grades into Guinea, Sudan and Sahel savannas. The Jos Plateau interrupts the central uplands, while the Adamawa and Mambilla highlands rise along the Cameroon frontier, where Chappal Waddi reaches about 2,419 metres, Nigeria’s highest point.
Climate changes markedly from the humid coast to the semi-arid northeast because rainfall is controlled by the seasonal movement of moist southwesterly Atlantic air and dry continental air from the Sahara. World Bank climate data put Nigeria’s 1995–2014 mean annual temperature at about 27.1°C and average precipitation at roughly 1,074 millimetres, but national averages conceal much larger regional contrasts. Southern districts commonly receive more than 2,000 millimetres of rain annually and have long wet seasons, whereas much of the far north receives below 1,000 millimetres, with the driest areas closer to 500–600 millimetres and a much shorter growing season. The harmattan brings dry, dusty northeasterly winds during the boreal winter, while pre-rainy-season heat can become severe inland. Flooding affects river basins and densely built southern cities, drought and land degradation constrain northern agriculture, and coastal erosion, sea-level exposure and petroleum pollution add distinct pressures in the Niger Delta.
These climatic belts support a broad ecological transition. The coast contains mangrove forests, freshwater swamps and the creek systems of the Niger Delta; inland southern zones retain fragments of lowland rainforest and derived forest-savanna mosaics; the middle belt is dominated by Guinea savanna, giving way northward to Sudan and Sahel vegetation. The Cross River forests near Cameroon are especially important for primates and other forest biodiversity, while Gashaka-Gumti National Park protects montane and savanna habitats around the eastern highlands. Agriculture remains closely tied to these ecological divisions: cassava, yam, oil palm, cocoa and plantain are important in wetter southern zones, while maize, sorghum, millet, groundnuts and livestock become more prominent northward; rice is cultivated in several river valleys and irrigated areas. Farm expansion, fuelwood use, grazing and urban growth have reduced natural vegetation, while rainfall variability and erosion increasingly affect crops and rural water security.
Long before a Nigerian state existed, the territory contained societies linked to different ecological zones and trading worlds. Archaeological evidence from central Nigeria includes the Nok cultural tradition, known for terracotta sculpture and early ironworking during the first millennium BCE and adjacent periods. In the northeast, Kanem-Bornu developed around the Lake Chad basin and participated in trans-Saharan commerce and Islamic networks; across the north, Hausa city-states such as Kano and Katsina became centres of trade, craft production and scholarship. In the southwest, Ife emerged as a major Yoruba religious and artistic centre, followed by powerful states including Oyo, while the Kingdom of Benin developed a centralized court whose metal and ivory arts became internationally renowned. Igbo-speaking areas included decentralized communities as well as institutions such as Nri and the later Aro commercial network. Portuguese contact began on the coast in the late fifteenth century, expanding commerce in pepper, ivory and eventually enslaved people. In the nineteenth century, Usman dan Fodio’s jihad created the Sokoto Caliphate across much of the north, reshaping political authority shortly before British expansion accelerated.
British control emerged unevenly from coastal annexation, chartered-company rule and military conquest rather than from a single transfer of sovereignty. Lagos was annexed in 1861; the Royal Niger Company extended commercial and political control along the Niger, while Britain defeated Benin in 1897 and conquered the Sokoto Caliphate and other northern polities in the early twentieth century. Northern and Southern Nigeria were amalgamated in 1914, creating borders and a fiscal-administrative framework that joined regions with very different institutions, educational histories and commercial orientations. Constitutional reforms after the Second World War strengthened regional federalism and Nigerian political participation, leading to independence on 1 October 1960 and republican status in 1963. Coups in 1966 were followed by the secession of the Eastern Region as Biafra and a civil war from 1967 to 1970. Military and civilian governments alternated for three decades, with oil revenues increasing the power of the federal state even as regional competition persisted. Civilian constitutional government returned in 1999 under the present federal presidential system, though insecurity, federal-state tensions and uneven institutional capacity continue to shape governance.
Nigeria’s economy is far more diversified in output than its export profile suggests. Services, including trade, telecommunications, finance, real estate and entertainment, account for the largest share of domestic activity, while agriculture remains a major employer and manufacturing is concentrated in food processing, cement, consumer goods and petrochemicals. Petroleum and natural gas nevertheless remain central to foreign exchange and public finance: crude oil alone represented 68.9% of merchandise exports in the fourth quarter of 2024, and the country remains an OPEC member. Expansion of domestic refining, including large-scale capacity around Lagos, is changing fuel-import patterns, while natural gas, fertilizers and agricultural products offer additional export potential. After statistical rebasing, the National Bureau of Statistics reported year-on-year real GDP growth of 3.89% in the first quarter of 2026; the IMF estimated 4.0% growth for 2025 and projected 4.1% for 2026. Yet high living costs, poverty, insecurity, weak power supply and logistics continue to limit how quickly macroeconomic stabilization translates into household gains.
Nigeria has not conducted a national census since 2006, when the official count was 140,431,790, so current demographic totals are estimates rather than enumerated figures. The World Bank places the population at about 237.5 million in 2025, making the country Africa’s most populous. Settlement is highly uneven: dense urban and peri-urban belts extend through Lagos and the southwest, the southeast has closely spaced towns and commercial centres, and Kano anchors a major northern population zone, while parts of the northeast and central interior are less densely settled. Recent UN urbanization estimates classify a clear majority of residents as urban, although metropolitan boundaries and changing statistical definitions complicate comparison. Lagos dominates finance, ports and industry; Kano is a major northern market; Ibadan, Port Harcourt, Benin City and Kaduna serve regional economies, while Abuja has grown rapidly as the federal capital. Administratively, Nigeria consists of 36 states plus the Federal Capital Territory and 774 constitutionally recognized local government areas.
English is the main official language of federal administration and education, but everyday Nigeria is intensely multilingual. Hausa functions as a major lingua franca across much of the north and beyond, Yoruba predominates across large parts of the southwest, and Igbo across much of the southeast, alongside hundreds of other languages including Fulfulde, Kanuri, Tiv, Ibibio, Edo, Nupe and Ijaw. The constitution permits National Assembly business in English and, when arrangements allow, Hausa, Igbo and Yoruba. Religious geography is similarly complex: Islam is predominant across much of the north and has deep roots in trans-Saharan scholarship and emirate institutions, while Christianity is strongest across much of the south and expanded substantially through nineteenth- and twentieth-century missions; indigenous religious systems continue to influence ritual, art and social life. Nigerian cultural production draws on these histories, from Ife and Benin art and Hausa architecture to modern literature, theatre, Nollywood cinema and globally influential popular music, with networks extending through a large diaspora.
Transport and energy infrastructure reflect Nigeria’s scale and the concentration of commerce in a few corridors. Roads carry most passengers and domestic freight, with heavily used axes linking Lagos with Ibadan, Abuja with Kaduna and Kano, and the southeast with Niger Delta ports; maintenance, congestion and security conditions vary sharply by route. The railway system combines inherited narrow-gauge lines with newer standard-gauge corridors, notably Abuja–Kaduna, Lagos–Ibadan and Warri–Itakpe, while services also operate on parts of the eastern network. Maritime trade is concentrated at Lagos Port Complex, Tin Can Island and Lekki Deep Sea Port, with Onne, Port Harcourt, Warri and Calabar serving eastern and Niger Delta markets. Lagos and Abuja are the principal international air gateways. Electricity remains a major constraint: World Bank data put access at 62.5% of the population in 2024, encouraging widespread use of private generators, solar systems and mini-grids. Internet use reached about 41% in 2024, underpinning a large digital-services sector despite persistent urban-rural gaps.
Nigeria’s regional weight comes from its population, Atlantic frontage, energy resources, consumer market and position between the Gulf of Guinea, Lake Chad basin and central Sahel. It is a founding African Union member, has belonged to OPEC since 1971, and remains the largest member of ECOWAS, whose Commission headquarters are in Abuja. Those links place Nigeria at the centre of West African trade, migration, power interconnection and security diplomacy, while instability around Lake Chad and the Sahel directly affects its northeastern and northwestern frontiers. Medium-term opportunities lie in stronger regional commerce, gas and electricity networks, domestic refining, digital services, agricultural productivity and a deeper manufacturing base. The constraints are equally structural: rapid population growth, insufficient reliable power, costly logistics, climate exposure, insecurity, weak public services and persistent poverty. Nigeria’s international importance therefore rests not simply on scale, but on whether its federal institutions and infrastructure can convert that scale into broader productivity and regional integration.
