斯维亚加河是俄罗斯的河流，位于乌里扬诺夫斯克州和鞑靼斯坦共和国，属于伏尔加河的右支流，河道全长375公里，流域面域16,700平方公里，注入喀山以西的古比雪夫水库，河流在11月至5月结冰，河畔城镇有乌里扬诺夫斯克。

The Sviyaga (Russian:Свияга, Tatar: CyrillicЗөя, LatinZöyä, Chuvash: Сĕве) is a river in the Ulyanovsk Oblast and Tatarstan, a right tributary of the Volga River. It is 375 kilometres (233 mi) long, and its drainage basin covers 16,700 square kilometres (6,400 sq mi). The Sviyaga River flows into the Sviyaga Cove of the Kuybyshev Reservoir, west of Kazan. It freezes up in November or December and stays under the ice until April or May. Major tributaries are the Arya, Bula, Karla, Kubnya, and Tosha rivers.