波罗的语族是印欧语系下的一族语言，使用地区处于北欧波罗的海沿岸。

共分两支：“西波罗的语支”（其下语言已全部灭亡）和“东波罗的语支”（目前仍在使用的此族语言都在其中）。虽同属一族，立陶宛语、拉脱维亚语和普鲁士语的区别很大，相互之间无法理解。普鲁士语现已灭亡，是此族中最古老的语言。

The Baltic languages belong to the Balto-Slavic branch of the Indo-European language family. Baltic languages are spoken by the Balts, mainly in areas extending east and southeast of the Baltic Sea in Northern Europe.

Scholars usually regard them as a single language family divided into two groups: Western Baltic (containing only extinct languages), and Eastern Baltic (containing two living languages, Lithuanian and Latvian). The range of the Eastern Balts once reached to the Ural mountains.