Lácar is a department located in the south of Neuquén Province, Argentina.

The Department is bounded by Huiliches Department to the north, Collón Cura Department to the northeast, Rio Negro Province to the southeast, Los Lagos Department to the south and Chile to the east.

40°09′24″S 71°21′09″W / 40.15667°S 71.35250°W / -40.15667; -71.35250