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Vue panoramique quartier cadjéhoun-Cotonou au Bénin

City Africa

Cotonou

Cotonou is the biggest city in Benin, a country in West Africa. It lies between the ocean and a lake.

Cotonou is the largest city in Benin, on a strip of land between the Atlantic Ocean and Lake Nokoué, Universalis says. It is not the official capital, which is Porto-Novo, but it grew with its port. Benin's 2013 census counted 679,012 people in Cotonou.

Cotonou, Benin's first city though not its official capital (Porto-Novo), lies on the coastal sand strip in front of Lake Nokoué; its growth followed the port, from the wharf of 1891 to the modern port of 1959–1965 (Universalis). Census 11 May 2013: 679,012.

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Photo: Adoscam, CC BY-SA 4.0, via Wikimedia Commons

Discover Cotonou

Cotonou is the biggest city in Benin. The sea is on one side, and a lake is on the other.

It is not Benin's capital, but many people live and work there.

Universalis says Cotonou is the first city of Benin, although the official capital is Porto-Novo. Cotonou grew on a wide strip of land along the coast, with Lake Nokoué behind it. A branch of the Ouémé River feeds the lake, and a channel joins it to the ocean.

Benin's census of 11 May 2013 counted 679,012 people in Cotonou, more than twice the 320,348 counted in 1979.

Universalis: although not the official capital (Porto-Novo, set by the Constitution and seat of the legislature), Cotonou is the first city of Benin; it grew on the broad coastal sand ridge behind which Lake Nokoué formed, fed by a branch of the Ouémé and joined to the ocean by a channel that cuts the city in two.

INSAE via City Population (Cotonou, which is also the department of Littoral): census 1979 320,348; 1992 536,827; 2002 665,100; census 11 May 2013 679,012 (rank 1 in Benin).

Country
Benin (the largest city; the official capital is Porto-Novo)
People in Cotonou (census, 11 May 2013)
679,012
Rank
Benin's first city (Universalis)
Setting
a wide strip of coastal land, with Lake Nokoué behind it (Universalis)
Vue panoramique quartier cadjéhoun-Cotonou au Bénin
Photo: Adoscam, CC BY-SA 4.0, via Wikimedia Commons

Rooftops and palm trees

This photo was taken from high up. You can see buildings with flat roofs, green trees and palm trees. The city stretches far away under a blue sky.

This photo looks over the Cadjèhoun district of Cotonou on 27 November 2019. Low buildings with flat or sloping roofs sit among leafy trees and palm trees, and taller white buildings rise here and there. The city stretches to the horizon under a blue sky with white clouds.

Universalis says the west of Cotonou, along the Atlantic, has the business district and newer residential areas, where houses stand among greenery.

Commons: 'Vue panoramique quartier cadjéhoun-Cotonou au Bénin' (panoramic view, Cadjèhoun district), own work by Adoscam, CC BY-SA 4.0, taken 27 November 2019. Wikidata: Cadjèhoun (Q106558349), 2.32 km WSW of the city point.

Universalis: to the west, the commercial and administrative district stretches along the Atlantic: an older zone where classic colonial style survives, more modern residential estates with villas surrounded by greenery, and the 'Cocotiers' ensemble near the airport.

Photo
a view over the Cadjèhoun district, 27 November 2019, by Adoscam
Cadjèhoun
a district of Cotonou, about 2.3 km from the city's Wikidata point (Wikidata)
West side
newer residential areas with houses among greenery (Universalis)
Vue panoramique quartier cadjéhoun-Cotonou au Bénin
Photo: Adoscam, CC BY-SA 4.0, via Wikimedia Commons

A city that grew with its port

Long ago, ships unloaded at a long pier in Cotonou. Later a modern port was built, and the city grew and grew.

Universalis says Cotonou's growth is tied to its port. A wharf, a long pier where ships could unload, was built in 1891. In time it became far too small, and a modern port was built between 1959 and 1965.

Many of the country's government offices and embassies are now in Cotonou, Universalis says, and a university was founded in 1970 at Abomey-Calavi, 15 kilometers away.

Universalis: the city spreads over land ceded to France by the ruler of Porto-Novo in 1868; its rise is linked to port activity: the wharf built in 1891, which became very inadequate, was succeeded by a modern port built from 1959 to 1965. The main administrative functions, once concentrated in Porto-Novo, are almost entirely carried out in Cotonou, where most ministers live and the embassies are; a university was founded in 1970 (Abomey-Calavi, 15 km). Wikidata: University of Abomey-Calavi (Q6979225), founded 1970, 10.91 km NW of the city point.

1891
a wharf (a long pier for ships) was built (Universalis)
1959–1965
a modern port was built to replace the wharf (Universalis)
1970
a university was founded at Abomey-Calavi, 15 km away (Universalis)
Vue panoramique quartier cadjéhoun-Cotonou au Bénin
Photo: Adoscam, CC BY-SA 4.0, via Wikimedia Commons

Through the years

A channel, a bridge and a port

A channel of water runs through the middle of Cotonou, from the lake to the sea. A bridge lets people cross from one side to the other.

Universalis says a channel joins Lake Nokoué to the Atlantic Ocean and cuts Cotonou in two. A narrow bridge carries both a road and a railway across it. East of the channel, the road and railway to Porto-Novo run between an industrial zone and the fast-growing district of Akpakpa.

Cotonou's port also serves Niger, Universalis says: part of Niger's trade travels to the port by road and by a railway that is run jointly.

Universalis: the lagoon (Lake Nokoué, fed by a branch of the Ouémé) communicates with the ocean through a channel that cuts the city into two parts; east of the pass, crossed by a narrow road-and-rail bridge, the road and railway to Porto-Novo separate an industrial zone from Akpakpa, a traditional residential district growing fast; part of Niger's trade passes through the port thanks to the road and the jointly operated railway.

The channel
joins Lake Nokoué to the ocean and cuts the city in two (Universalis)
Across the channel
a narrow bridge for both road and railway traffic (Universalis)
Trade with Niger
part of Niger's trade passes through Cotonou's port by road and a jointly run railway (Universalis)

Warm all year, with two rainy seasons

Cotonou is warm all year. June is very rainy, and December and January are dry.

The Japan Meteorological Agency's world averages for Cotonou for 1991 to 2020 show warm weather all year: the monthly average temperature stays between 25.8 °C in August and 29.4 °C in March.

The rain has two peaks. June is the wettest month, with 353.9 millimeters, and October is wet too, with 169.2. In between, August gets only 41.9 millimeters, and December is the driest month, with 12.1. The twelve months add up to about 1,365 millimeters.

Japan Meteorological Agency world normals, Cotonou (station 65344, 6.35° N 2.38° E, 5 m; normals period 1991–2020 per JMA's index): monthly mean temperature 27.9 (Jan), 29.0, 29.4 (Mar), 29.1, 28.4, 27.1, 26.3, 25.8 (Aug), 26.4, 27.3, 28.5, 28.4 °C. Precipitation 21.3, 37.5, 87.5, 140.3, 203.3, 353.9 (Jun), 107.3, 41.9, 144.1, 169.2 (Oct), 46.6, 12.1 (Dec) mm; sum of the twelve monthly normals 1,365.0 mm (no annual figure on the page). No daily highs and lows in this table.

Average temperature (JMA, Cotonou, 1991–2020)
25.8 °C (August) to 29.4 °C (March)
Wettest month (same table)
June, 353.9 mm
Rain in a year (twelve months added up)
about 1,365 mm

A great market, fishing and factories

Cotonou has a market where traders come from many countries. People also fish in the lake and the sea, and most of Benin's industries are here.

Universalis says Cotonou's Dantokpa Market draws traders not only from Benin but also from Nigeria, Togo and even Côte d'Ivoire. The city is a trading center for a region far beyond Benin's borders.

Cotonou has two-thirds of Benin's industries. People also fish, mostly on Lake Nokoué, and a small fleet of trawlers fishes at sea. On the edges of the city, farmers grow corn and cassava and raise cattle under the palm trees.

Universalis: primary activities still matter: small-scale fishing, above all on Lake Nokoué; industrial sea fishing by a small fleet of trawlers; maize and cassava growing and cattle raising under the palms in the near suburbs; Cotonou holds two-thirds of the country's industries; old trading houses import finished goods and ship farm produce (mainly oilseeds) from the interior and from Niger; a redistribution center for a zone well beyond the borders: the Dantokpa market is used by traders from Benin, Nigeria, Togo and even Côte d'Ivoire. Wikidata: Dantokpa Market (Q3015740), opened 1963, 2.02 km ENE of the city point.

Dantokpa Market
visited by traders from Benin, Nigeria, Togo and even Côte d'Ivoire (Universalis)
Industry
Cotonou has two-thirds of the country's industries (Universalis)
Fishing and farming
small-scale fishing, mostly on Lake Nokoué, and sea fishing by a small fleet of trawlers (Universalis)
Vue panoramique quartier cadjéhoun-Cotonou au Bénin
Photo: Adoscam, CC BY-SA 4.0, via Wikimedia Commons

Cotonou on the map

Find Benin on the globe, in West Africa. Cotonou is on its coast, by the Atlantic Ocean.

Cotonou lies at about 6.4° north and 2.4° east, on Benin's Atlantic coast in West Africa, with Lake Nokoué just behind the city.

Measured from the city's center point on Wikidata, Dantokpa Market is about 2 kilometers east-northeast, the Cadjèhoun district about 2.3 kilometers west-southwest and the University of Abomey-Calavi about 10.9 kilometers northwest.

Cotonou lies at about 6.37° N and 2.42° E (Wikidata point Q43595; the Natural Earth/sheet point is 11.87 km east-northeast of it). From the Wikidata point: Dantokpa Market (Q3015740) 2.02 km ENE; Cadjèhoun (Q106558349) 2.32 km WSW; University of Abomey-Calavi (Q6979225) 10.91 km NW.

Latitude
about 6.4° north
Longitude
about 2.4° east
Water
the Atlantic Ocean in front, Lake Nokoué behind (Universalis)

Amazing facts

  • Traders come to Cotonou's Dantokpa Market from many different countries!

    Universalis says Dantokpa Market is visited by traders from Benin, Nigeria, Togo and even Côte d'Ivoire.

    Universalis: the Dantokpa market is frequented by Beninese traders but also Nigerian, Togolese and even Ivorian ones.

  • A channel of water cuts Cotonou into two parts!

    Universalis says the channel that joins Lake Nokoué to the ocean cuts Cotonou in two, with a narrow bridge for road and rail between the halves.

    Universalis: a channel linking the lagoon to the ocean cuts the agglomeration into two parts, crossed by a narrow road-and-rail bridge.

  • In Cotonou, June gets almost 30 times as much rain as December.

    In the Japan Meteorological Agency's averages, June brings Cotonou 353.9 millimeters of rain and December just 12.1 millimeters.

    JMA world normals for Cotonou (1991–2020): June 353.9 mm, December 12.1 mm, a ratio of about 29.

Words to know

wharf
a long platform built out over the water where ships load and unload
lagoon
a body of water partly cut off from the sea
channel
a narrow stretch of water that joins two larger bodies of water
trawler
a fishing boat that pulls a large net through the water
cassava
a plant with a thick root that people cook and eat
census
an official count of all the people in a country

Discovery challenge

  1. Cotonou is the biggest city in which country?

    Cotonou is the largest city of which West African country?

    Universalis calls Cotonou the first city of which country, whose official capital is Porto-Novo?

    • Benin
    • Kenya
    • Egypt
    Show the answer

    Benin

    Benin!

    Benin.

    Benin.

  2. Which lake is behind Cotonou?

    Which lake lies behind Cotonou's strip of coastal land?

    Universalis: behind the coastal ridge on which Cotonou grew, which lake formed?

    • Lake Nokoué
    • Lake Victoria
    • Lake Titicaca
    Show the answer

    Lake Nokoué

    Lake Nokoué!

    Lake Nokoué.

    Lake Nokoué.

  3. What is Benin's official capital?

    Cotonou is the biggest city, but which city is Benin's official capital?

    Which city does Benin's Constitution make the official capital?

    • Porto-Novo
    • Lagos
    • Dakar
    Show the answer

    Porto-Novo

    Porto-Novo!

    Porto-Novo.

    Porto-Novo.

  4. In which year was Cotonou's first long pier for ships built?

    In which year was Cotonou's wharf built?

    Universalis: the wharf that preceded the modern port was built in which year?

    • 1891
    • 1965
    • 2013
    Show the answer

    1891

    1891!

    1891.

    1891.

  5. Which month is the rainiest in Cotonou?

    In the Japan Meteorological Agency's averages, which month gets the most rain in Cotonou?

    JMA world normals for Cotonou (1991–2020): which month has the highest precipitation, 353.9 mm?

    • June
    • December
    • August
    Show the answer

    June

    June!

    June.

    June (353.9 mm).

Nearby places

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For parents & teachers

What children will learn

  • Locate Cotonou on the Atlantic coast of Benin, in West Africa.
  • Explain how a port can make a city grow.
  • Describe why a country's biggest city is not always its capital.
  • Read a climate table with two rainy seasons.

Recommended ages: 3 to 17 · About 15 minutes

Talk about it

  • Why might one country send some of its goods through another country's port?
  • What makes a market a meeting place for people from many countries?
  • What would it be like to live between the sea and a lake?

Try at home or in class

  • Coast model: in a tray, make a sand strip with 'ocean' on one side and a 'lake' on the other, then cut a channel and add a bridge.
  • Rain bars: make a bar chart of Cotonou's monthly rain and find its two peaks.
  • Time math: the wharf was built in 1891 and the modern port finished in 1965. How many years apart is that?

Key vocabulary: wharf, lagoon, channel, trawler, cassava, census

Where these facts come from

  1. Wikidata , Wikimedia Foundation (CC0 1.0)
  2. Natural Earth vector data , Natural Earth (NACIS) (Public domain)
  3. Cotonou , Encyclopædia Universalis
  4. Benin: Cities , City Population (Thomas Brinkhoff), from INSAE Benin
  5. Cotonou: monthly normals (1991–2020) , Japan Meteorological Agency
  6. World normals by region and country (normals period 1991-2020) , Japan Meteorological Agency
  7. File:Vue panoramique quartier cadjéhoun-Cotonou au Bénin 1.jpg (Adoscam, November 2019) , Wikimedia Commons
  8. Wikimedia Commons , Wikimedia Foundation (Per file (public domain, CC0, CC BY or CC BY-SA); see each media record)

Checked, not yet human-reviewed. Last updated November 1, 2026. Spotted a mistake? Tell us.

Picture credits
  • Photo: Adoscam, CC BY-SA 4.0, via Wikimedia Commons · source · license