Crasna (Hungarian: Kraszna) is the name of a river in north-western Romania and north-eastern Hungary,

The river Crasna is a tributary of the river Tisza. Its source is in Transylvania, Romania, near the town Crasna. It flows through the Romanian counties Sălaj and Satu Mare and the Hungarian county Szabolcs-Szatmár-Bereg. It flows into the river Tisza in Vásárosnamény. Cities along the river Crasna are Şimleu Silvaniei, Carei (Romania) and Mátészalka.

See also

• Crasna, Sălaj, a town in north-western Romania, on the river Crasna;
• Crasna, Vaslui