Aukštaitija is the name of one of five ethnographic regions of Lithuania. The name comes from the fact that the lands are in the upper basin of the Nemunas, as opposed to the Lowlands that begin from Šiauliai westward. Although Kaunas is surrounded by Aukštaitija, the city itself is not considered to be a part of any ethnographic region in most cases.

Lithuania can be divided into five historical and cultural regions. The exact borders are not fully clear, as the regions are not official political or administrative units. They are delimited by culture, such as country traditions, traditional lifestyle, songs, tales, etc. To some extent, regions correspond to the zones of Lithuanian language dialects. This correspondence, however, is by no means strict. For example, although the Dzūkian dialect is called South Aukštaitian, it does not mean that Dzūkija is part of Aukštaitija. In certain parts of some regions, dialects of other regions are spoken, while for example in Samogitia, there are three indigenous dialects, some of which are subdivided into subdialects.