Aukštaitija is the name of one of five ethnographic regions of Lithuania.

The name comes from the relatively high elevation of the region, particularly the eastern parts.

The people mostly speak the Aukštaitian dialect of Lithuanian.

Under the new classification of dialects Lithuanian is divided into just two dialects, Aukštaitian and Samogitian with all previous dialects being classified as subdialects.

The Sudovian and Dzukian dialects are also considered subdialects of Aukštaitian now, therefore the specific subdialect spoken in Aukštaitija is known as East Aukštaitian.