Josvainiai Eldership (Lithuanian: Josvainių seniūnija) is a Lithuanian eldership, located in the southern part of Kėdainiai District Municipality.

Eldership was created from the Josvainiai selsovet in 1993.

The territory of Josvainiai Eldership is located mostly in the Nevėžis Plain, but the western edges are in the East Samogitian Plateau.

Relief is mostly flat, 2/3 of the territory is agriculture lands, about 1/3 is covered by forests.

Following settlements are located in the Josvainiai Eldership (as for 2011 census):[1]