Rivers of the USA
From the mighty Mississippi to the wild rivers of the west, the United States is shaped by its waterways. In this map you trace the great American rivers and learn where they rise, which states they flow through and where they reach the sea.
Key rivers to know include the Mississippi and its huge tributary the Missouri (together the longest river system in North America), the Ohio, the Colorado that carved the Grand Canyon, the Rio Grande along the Mexican border, and the Columbia in the Pacific Northwest. Together they explain why cities such as New Orleans, St. Louis and Memphis grew exactly where they did.
Follow each river across the country and lock it into memory — geography that suddenly makes sense, free in Toponauts.
▶︎ Play nowFrequently asked questions
What is the longest river in the USA?
The Missouri River is the longest river in the United States at about 3,767 km, just ahead of the Mississippi. The two join near St. Louis, and together the Mississippi–Missouri system is the longest in North America and among the largest in the world.
Which river carved the Grand Canyon?
The Colorado River carved the Grand Canyon over millions of years. It rises in the Rocky Mountains and flows through Utah and Arizona, supplying water to much of the dry American Southwest before crossing into Mexico on its way to the sea.
Which river forms part of the US–Mexico border?
The Rio Grande forms a long stretch of the border between Texas and Mexico, running about 3,000 km from Colorado to the Gulf of Mexico. It is one of the most important rivers of the American Southwest, though much of its water is drawn off for irrigation.
Why is the Mississippi River important?
The Mississippi is the main artery of the central United States, draining more than 30 states. It shaped major cities such as New Orleans, St. Louis and Memphis, carries huge amounts of freight by barge, and runs deep through American trade, music and history.