Didžiasalis is a linear village in the Ignalina eldership, Lithuania.

It is located about 10 kilometres (6.2 mi) from Ignalina near the Ignalina–Švenčionys road.

It is situated within the Sirvėta Regional Park.

[1] Due to its archaic architecture, the village is an ethnocultural reserve, which includes 42 homesteads and 25 individually protected buildings.

Homesteads have irregular plans, some of which are located on both sides of the street.