| Crasna | |
| Name Other: | (Kraszna) |
| Pushpin Map: | Hungary#Romania |
| Subdivision Type1: | Countries |
| Subdivision Name1: | Romania and Hungary |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Romania: Sălaj and Satu Mare Hungary: Szabolcs-Szatmár-Bereg |
| Subdivision Type3: | Towns |
| Length: | 193km (120miles) |
| Mouth: | Tisza |
| Mouth Location: | Vásárosnamény |
| Mouth Coordinates: | 48.1378°N 22.3189°W |
| Basin Size: | 1931km2 |
| Tributaries Right: | Zalău |
The Crasna (Romanian) or Kraszna (Hungarian) is the name of a river in northwestern Romania and northeastern Hungary. The Crasna is a left tributary of the Tisza. Its source is in Transylvania, Romania, near the village of Crasna. It flows through the Romanian counties Sălaj and Satu Mare and the Hungarian county Szabolcs-Szatmár-Bereg. It flows into the Tisza in Vásárosnamény. Cities along the Crasna are Șimleu Silvaniei in Romania, Nagyecsed and Mátészalka in Hungary.
Until the 1890s the Crasna discharged into the river Someș. Since then, the lower course of the Crasna has been regulated and it discharges into the Tisza 3.5 km downstream of the confluence of Tisza and Someș.[1] Its basin size is 1931km2.[1]
The following towns and villages are situated along the river Crasna, from source to mouth: Cizer, Horoatu Crasnei, Crasna, Vârșolț, Pericei, Șimleu Silvaniei, Măeriște, Sărmășag, Bobota, Supur, Acâș, Craidorolț, Moftin, Berveni (in Romania) and Nagyecsed, Mátészalka and Vásárosnamény (in Hungary).
The following rivers are tributaries to the Crasna: