Alsėdžiai is a small town in the Plungė district municipality. It is near the Sruoja River, from Plungė.
Alsėdžiai is an administrative center of the Alsėdžiai eldership. Stanisław Narutowicz, one of the signers of Act of Independence of Lithuania and brother to the first president of Poland Gabriel Narutowicz is buried in the village cemetery.
As of 2001, there were 956 inhabitants living in this town.