The Source of Sviyaga River (Russian: Исток реки Свияга) is a complex natural hydrological feature listed in the inventory of a protected area of the Ulyanovsk region in Russia.

The source of Sviyaga River is the most important feature of the protected area, with significant conservation and environmental value.

The main source of the Sviyaga River originates from a wood-bog, and is a small pure streamlet which flows into a deep broad gully with hygrophyte vegetation.

It is in poor condition due to the conduct of business such as livestock which trample the area.

Downstream three dams intercept the greatest part of water, creating businesses which pollute it.