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Longest Rivers in the World Quiz

How well do you know the longest rivers in the world? Floored turns the ranking into a building: floor 1 is the top of the list. We name a floor, you guess what's on it, and the lift rides to whatever you picked so you know to go higher or lower.

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How it works

You get a few guesses per floor. Land it on your first guess for 10 points; a near miss still scores. After the rivers round, four more lists from the same topic keep the ride going.

Show the full ranking (35)
  1. Nile 6,650 km (4,130 mi)
    Its basin takes in parts of 11 countries before it reaches the Mediterranean.
  2. Amazon 6,400 km (3,976 mi)
    It carries about 20% of all the water that rivers pour into the world's oceans.
  3. Yangtze 6,300 km (3,917 mi)
    The Three Gorges Dam on it is the largest hydroelectric power station in the world.
  4. Mississippi 6,275 km (3,902 mi)
    The Missouri, measured as part of this system, is slightly longer than the Mississippi itself.
  5. Yenisei 5,539 km (3,445 mi)
    Its basin includes Lake Baikal, the world's deepest lake.
  6. Yellow River 5,464 km (3,395 mi)
    Its color comes from huge loads of silt picked up as it crosses the Loess Plateau.
  7. Ob 5,410 km (3,364 mi)
    It empties into the Gulf of Ob, an Arctic bay about 1,000 km long.
  8. Parana 4,880 km (3,030 mi)
    It ends in the Rio de la Plata, the wide estuary between Argentina and Uruguay.
  9. Congo 4,700 km (2,922 mi)
    It's the deepest river ever measured, with depths of around 220 m.
  10. Amur 4,444 km (2,763 mi)
    Much of it forms the border between the Russian Far East and northeast China.
  11. Lena 4,400 km (2,736 mi)
    The Lena Pillars, tall rock formations, line its banks near the city of Yakutsk.
  12. Mekong 4,350 km (2,705 mi)
    It runs through China, Myanmar, Laos, Thailand, Cambodia and Vietnam.
  13. Mackenzie 4,241 km (2,637 mi)
    With the Slave, Peace and Finlay rivers, it forms Canada's longest river system.
  14. Niger 4,200 km (2,611 mi)
    It rises just 240 km from the Atlantic but flows away from the sea, toward the Sahara.
  15. Brahmaputra 3,969 km (2,466 mi)
    It breaks through the Himalayas via the Yarlung Tsangpo Grand Canyon.
  16. Murray 3,672 km (2,282 mi)
    Dredges have worked around the clock at its mouth since the early 2000s to keep it open.
  17. Tocantins 3,650 km (2,270 mi)
    The Para River, often called a mouth of the Amazon, is really its lower reach.
  18. Volga 3,645 km (2,266 mi)
    It ends in the Caspian Sea, which has no outlet to the ocean.
  19. Euphrates 3,596 km (2,236 mi)
    It joins the Tigris to form the Shatt al-Arab, which flows into the Persian Gulf.
  20. Madeira 3,380 km (2,100 mi)
    It's the Amazon's biggest tributary, carrying about 15% of the basin's water.
  21. Purus 3,211 km (1,995 mi)
    It winds so much that its straight-line length is less than half its length along the river.
  22. Yukon 3,185 km (1,980 mi)
    It was a main route for prospectors during the Klondike Gold Rush of 1896 to 1903.
  23. Indus 3,180 km (1,976 mi)
    The word 'India' is derived from the name of this river.
  24. Sao Francisco 3,180 km (1,976 mi)
    It's the longest river that runs entirely within Brazil.
  25. Syr Darya 3,078 km (1,913 mi)
    It flows from the Tian Shan mountains to the northern remnants of the Aral Sea.
  26. Salween 3,060 km (1,901 mi)
    In China, where it's called the Nu, it's one of the last big free-flowing rivers.
  27. St. Lawrence 3,058 km (1,900 mi)
    Measured as a system, it runs back through the Great Lakes and the Niagara River.
  28. Rio Grande 3,057 km (1,900 mi)
    In Mexico it's known as the Rio Bravo.
  29. Lower Tunguska 2,989 km (1,857 mi)
    It comes within 15 km of the Lena near Kirensk, yet drains into the Yenisei.
  30. Colorado 2,945 km (1,830 mi)
    It flows through the Grand Canyon before reaching Lake Mead.
  31. Danube 2,888 km (1,795 mi)
    It passes through or touches the borders of 10 countries on its way to the Black Sea.
  32. Irrawaddy 2,809 km (1,746 mi)
    It's Myanmar's most important commercial waterway.
  33. Zambezi 2,740 km (1,703 mi)
    Victoria Falls is its most famous feature.
  34. Vilyuy 2,720 km (1,700 mi)
    It's the longest tributary of the Lena.
  35. Ganges 2,704 km (1,690 mi)
    In Hinduism the river is personified as the goddess Ganga.

Source: Wikipedia: List of river systems by length · as of 2026-10

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