Senegal, officially the Republic of Senegal, covers 196,712 square kilometres at the western edge of mainland Africa, where the Sahel meets the Atlantic Ocean. Mauritania lies to the north across the Senegal River, Mali to the east, and Guinea and Guinea-Bissau to the south and southeast. The Gambia forms a narrow east–west corridor along the Gambia River that penetrates Senegal from the Atlantic and nearly separates the southern Casamance from the rest of the country. Dakar, the capital, occupies the Cap-Vert Peninsula. Most territory is low and gently undulating, with sandy plains and plateaus dominating the west and centre, the dry Ferlo occupying much of the northeast, and wetter lowlands extending through Casamance. Relief becomes more pronounced only in the far southeast around Kédougou, near the Fouta Djallon margins, where elevations rise above 600 metres. The Senegal, Saloum, Gambia and Casamance river systems organize much of the country’s agricultural and settlement geography.
Climate varies sharply from the Sahelian north to the wetter south. The main rainy season is generated by the northward movement of the West African monsoon, beginning earlier and lasting longer in Casamance than in the Senegal River valley and Ferlo; annual rainfall can be below about 300 millimetres in the far north but exceed 1,500 millimetres in parts of the south. The dry season is prolonged by continental air masses and the Harmattan, while Dakar and other coastal areas are moderated by Atlantic influence and the cool Canary Current. These gradients determine cropping calendars, pasture availability and surface-water reliability. Drought remains a recurrent risk in northern and central districts, but intense rainfall also produces destructive urban flooding, particularly in low-lying Greater Dakar. Coastal erosion, saltwater intrusion and soil salinization affect stretches of the Atlantic shore and the Saloum and Casamance estuaries, while rising temperatures and variable rainfall add pressure to farming, fisheries and water systems.
The ecological transition across Senegal is equally pronounced. Sahelian steppe and thorn scrub characterize much of Ferlo, where mobile and semi-mobile pastoralism remains important; farther south, Sudanian savanna, wooded grassland and gallery forest become more extensive, while Casamance supports denser woodland, palm formations, mangroves and rice-growing wetlands. In the southeast, the 913,000-hectare Niokolo-Koba National Park protects extensive savanna, dry forest and riverine habitat; the Djoudj National Bird Sanctuary in the Senegal River delta is internationally important for migratory waterbirds, and the Saloum Delta combines mangroves, tidal channels and fisheries. Agriculture is still strongly rain-dependent. Groundnuts, millet, sorghum and maize dominate many central farming systems, irrigated rice is important along the Senegal River, and rice cultivation also has deep roots in Casamance. The Niayes coastal strip supports intensive horticulture, while livestock and marine fishing sustain livelihoods where crop farming is more constrained.
The territory of present-day Senegal formed part of wider Senegambian and Sahelian political worlds long before a modern national border existed. Communities along the Senegal River participated in trans-Saharan exchange, and Takrur emerged there as an important state by the early second millennium, adopting Islam through North African and Saharan contacts. Later, parts of the region were influenced by the Mali Empire, while the Jolof polity became a major power between the Senegal and Gambia rivers before fragmenting into states including Waalo, Cayor, Baol and Jolof itself; Sine and Saloum remained important Serer kingdoms farther south and west. Portuguese navigators reached the coast in the fifteenth century, followed by Dutch, English and French competition. Atlantic trade linked coastal settlements to markets for gold, gum arabic, ivory, agricultural products and enslaved people. Saint-Louis and Gorée became significant French bases, but European influence remained uneven inland until the nineteenth century, when French military expansion, railways and the commercialization of groundnuts reordered older political systems and tied the interior more closely to Atlantic export routes.
Colonial Senegal became one of the principal territories of French West Africa, with Dakar serving as the federation’s capital from 1902. French rule combined coercive conquest and taxation with differentiated political arrangements: residents of the Four Communes of Saint-Louis, Gorée, Rufisque and Dakar acquired limited forms of French representation, and Blaise Diagne’s election to the French Chamber of Deputies in 1914 became a landmark in colonial politics. Outside those communes, most colonial subjects remained under separate and unequal legal regimes, including the indigénat. After the Second World War, expanded representation, trade-union activity and political organization accelerated decolonization. Senegal entered the French Community in 1958, joined French Sudan in the Mali Federation in 1959, and achieved sovereignty in 1960; the federation broke apart within months. Under Léopold Sédar Senghor and later Abdou Diouf, the state was highly presidential but gradually permitted broader multiparty competition. A separatist conflict began in Casamance in 1982. Peaceful changes of national power in 2000, 2012 and 2024 nevertheless established a strong regional reputation for electoral continuity despite periodic constitutional and political tensions.
Senegal’s economy is led by services but remains closely tied to agriculture, fisheries, mining, construction and a substantial informal sector. The export base developed around groundnuts, phosphates and fish, later broadening to gold, phosphoric acid, zircon, cement and refined petroleum; since 2024–25 it has begun to be reshaped by oil from the offshore Sangomar field and gas from the Greater Tortue Ahmeyim project shared with Mauritania. World Bank data put real GDP growth at 6.7 percent in 2025, while consumer-price inflation averaged about 1.5 percent. Remittances are also structurally important, amounting to 10.6 percent of GDP in 2023. The new petroleum era offers additional export earnings, electricity feedstock and fiscal revenue, but it arrives alongside severe balance-sheet constraints. After audits and reconciliation uncovered previously unreported liabilities, the IMF estimated total public-sector debt at about 132 percent of GDP at end-2024. That burden, together with weak job creation outside hydrocarbons, exposure to imported food and fuel, and productivity gaps in farming and industry, makes diversification and fiscal transparency central development issues.
The 2023 national census counted 18,126,390 residents, and Senegal’s statistical agency projected the population at about 19.1 million in 2025. Settlement is highly uneven: the Dakar region occupies only a tiny fraction of national territory yet contains roughly a fifth of the population, and the 2023 census found that Dakar, Thiès and Diourbel together held about 47 percent of all residents. UN estimates place the urban share at about 56 percent in 2025, reflecting the continued expansion of Greater Dakar as well as Touba, Thiès, Kaolack, Saint-Louis, Ziguinchor and secondary centres along major roads and agricultural zones. Touba’s growth is inseparable from its role as the spiritual centre of the Mouride brotherhood, while Thiès has long been shaped by transport and industry. Rural densities remain much lower in Ferlo and the southeast. Senegal is a unitary republic divided into 14 administrative regions, themselves subdivided into departments and arrondissements, with elected local authorities operating alongside representatives of the central state.
French is the official language of the republic, but everyday Senegal is markedly multilingual. Wolof functions as the principal lingua franca, especially in Dakar and much of the west, while Pulaar, Serer, Jola languages, Mandinka, Soninke and other languages remain central to regional, family and cultural life. Islam is the dominant religion, and religious organization is strongly shaped by Sufi brotherhoods, particularly the Tijaniyya and Mouridiyya, whose networks influence education, commerce, migration and social authority. Christian communities, especially Roman Catholic, form a smaller but historically established minority, and religious practice often intersects with older local customs. Cultural production reflects these overlapping histories rather than a single ethnic tradition. Griot and jeli lineages preserve oral history and musical knowledge; sabar drumming and mbalax developed into nationally influential forms; writers such as Léopold Sédar Senghor and Mariama Bâ and filmmaker Ousmane Sembène helped give Senegal an outsized place in Francophone African literature and cinema.
Transport and energy networks are most developed around Dakar and the west-central corridor, reinforcing the capital’s economic dominance. The Port of Dakar is the country’s principal maritime gateway and an important outlet for landlocked Mali, while the Dakar-Bamako road corridor carries regional freight despite logistics, safety and maintenance constraints. The historic railway toward Mali has suffered long deterioration, whereas metropolitan investment has produced newer systems: the Train Express Régional currently links Dakar with Diamniadio, and Dakar’s all-electric bus rapid transit system entered full operations in 2025. Blaise Diagne International Airport near Diass is the main aviation hub. Electricity access reached 82.9 percent of the population in 2024, but rural coverage still lagged urban areas. Senegal is expanding solar and wind generation, pursuing gas-to-power projects and participating in OMVS, OMVG and West African Power Pool interconnections. Internet use reached about 60 percent in 2024, though digital and utility access remains less reliable outside major urban centres.
Senegal’s wider importance comes from the conjunction of Atlantic access, Sahelian connections and relatively durable institutions. It is a member of ECOWAS and the West African Economic and Monetary Union, uses the West African CFA franc, and helps make Dakar a major regional centre. The Port of Dakar and corridors toward Mali link the Atlantic to the interior, the Senegal and Gambia river organizations bind it to neighbouring states, and the Greater Tortue Ahmeyim gas field creates a direct energy partnership with Mauritania. These advantages coexist with hard structural constraints: very high public debt, rapid labour-force growth, metropolitan congestion, unequal rural services, pressure on fisheries and farmland, and exposure to drought, flooding and coastal change. Hydrocarbons, renewable energy, agro-processing and regional logistics can expand the productive base, but Senegal’s medium-term weight will depend less on resource extraction itself than on whether new revenues are converted into resilient infrastructure, human capital and credible public finances.
