Which river is the largest by length in Europe?

The Volga River is Europe’s longest river, measuring about 3,530 kilometres from its source to the Caspian Sea. It flows entirely within Russia and has long been central to the country’s history, transport, and industry. The Volga basin is one of the most populous and economically important regions in Russia. The river is connected to several canal systems that link it to other waterways. Its cultural importance is immense, and it has been described as the national river of Russia.