Šventežeris (literally: sacred lake) is a small town in Alytus County in southern Lithuania.

[1] It is situated some 8 kilometres (5.0 mi) east of Lazdijai on the banks of Lake Šventežeris.

The town traces its history to Jerzy Radziwiłł, castellan of Trakai, who distributed land to his serfs.

[2] His heirs built a Calvinist church in 1598 and turned the town into a parish seat.

Samuel Bogusław Chyliński (1631–1668), son of a Protestant priest and first translator of the Bible into the Lithuanian language whose translation was put to print, was born in the town.