The Evrotas or Eurotas is the main river of Laconia and one of the major rivers of the Peloponnese, in Greece. The river's springs are located just northwest of the border between Laconia and Arcadia, at Skortsinos. The river is also fed by underwater springs at Pellana and by tributaries coursing down from Mt. Taygetos and Mt. Parnon, which flank the Evrotas Valley to the west and east, respectively. The river is 82 kilometres (51 mi) long, flowing in a north-south direction and emptying into the Laconian Gulf. Its drainage basin is 2,239 km2 (864 sq mi).

The Evrotas Valley is an 82 km elongated valley between Taygetus and Parnon which traverses Laconia, Greece. Homer called the valley Kili Lakedemon, while Sparta, Mystras and Gytheio are the main cities within the valley. It is one of the largest valleys in Greece. The valley is predominantly an agricultural region that contains many citrus groves, olive groves, and pasture lands. It is the location of the largest orange production in the Peloponnese and probably in all of Greece. Lakonia, a brand of orange juice, is based in Amykles. The Evrotas Valley records the highest summer mean maximum temperatures in Greece.