Rivers
100 World Rivers Quiz
The expert river map quiz: 100 rivers worth knowing, not just the longest, from the Amazon’s tributaries to the Tiber. Find or name them in 15 minutes.
Every river is labelled. Tap or click one (or pick it from the list) to see its length, where it starts and ends, and the countries it flows through. Zoom in to see every name.
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All rivers on this map
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Sources and notes
Rivers are drawn from Natural Earth’s 1:10m rivers and lake centerlines (public domain), with its European and North American supplements: each river’s named pieces are joined into one line from its source to its mouth, including where it runs through a lake. Tributaries are separate rivers, so the Missouri and the Mississippi, or the Blue Nile and the Nile, are drawn and named on their own.
River lengths depend on where you put the source and the mouth, and on how closely you follow the bends, so books disagree. The lengths here come from one source per river, each checked against at least one other reference or national agency: the CIA World Factbook where it lists the river and the others agree (the source the 10 longest rivers quiz uses), the US Geological Survey for rivers of the United States, and for the rest the river’s Wikipedia article or, where it publishes one, the river basin commission’s or water agency’s figure.
The Nile and the Amazon are the two longest rivers, and which one is longer is still argued. The World Factbook puts the Nile first (6,650 km against the Amazon’s 6,436 km); some studies that measure the Amazon from a more distant source in Peru put it ahead.
Some rivers are counted as systems in lists of the longest: the Mississippi–Missouri (6,275 km), the Yenisei–Angara (5,539 km) and the Ob–Irtysh (5,410 km). Here each river has its own length, so the Mississippi alone is shorter than the system it belongs to.
Other names count: the local name or an old spelling (Chang Jiang, Huang He, Ganga, Dnipro, Wisła), and you can add or leave out “River” or “Rio”.
Find on the map: we name a river, you click its line or its dot. Practice gives you three tries and highlights the right part of the map after two misses; Test gives you three tries without hints; Strict gives you one. After the last miss, the river is shown and the next one comes up.
The Red River in the world quizzes is the Red River of China and Vietnam (the Hồng), which reaches the sea below Hanoi.
Natural Earth: rivers and lake centerlines, 1:10m (public domain)
CIA World Factbook: Major rivers (CC0 factbook.json archive)
US Geological Survey: Largest Rivers in the United States (Open-File Report 87-242)
Wikipedia: river articles (CC BY-SA)
CAWater-info: Syr Darya basin knowledge base
CAWater-info: Amu Darya basin knowledge base
CARU (Comisión Administradora del Río Uruguay): the Uruguay River
About these 100 rivers
The 50 world rivers, then 50 more for experts: big tributaries (the Rio Negro, Purus, Xingu and Tapajós of the Amazon, the Blue Nile, the Ubangi and Kasai of the Congo, the Irtysh and the Angara), the great rivers of India and China that the shorter quizzes leave out (the Godavari, Narmada and Yamuna, the Pearl, Songhua and Red River), and famous shorter rivers such as the Jordan, the Tiber and the Shannon.
Europe, eastern China and the Amazon basin are crowded at world scale: zoom in (pinch, scroll or the + button) and the lines get thicker and every name appears. In find mode every river also has a dot you can tap.
The longest rivers on this map
- Nile 6,650 km (4,132 mi)
- Amazon 6,436 km (3,999 mi)
- Yangtze 6,300 km (3,915 mi)
- Yellow River 5,464 km (3,395 mi)
- Paraná 4,880 km (3,032 mi)
Each river’s length here is its own, measured by the source named in the notes below; lists of the longest rivers often count a river together with its headwaters or its biggest tributary.