The Lutto (Finnish: Luttojoki or Lutto, Northern Sami: Lotto or Lohttu, Skolt Sami: Lått, Russian: Лотта and Norwegian: Lotta) is a river that is part of the watercourse of the Tuloma. It flows through the eastern parts of the municipalities of Inari and Sodankylä in Finland and in the southern part of Pechenga in Murmansk Oblast, Russia.