Cognitive impairment is now widely accepted as a fundamental aspect of Parkinson's disease (PD). Given the prevalence of cognitive impairment and the associated impact on well-being, evidence-based interventions are needed. However, while research is continually accumulating in order to better understand the pathology and trajectory of cognitive changes, treatment options lag behind. Nonpharmacological approaches are of particular interest in this group, given the typical polypharmacy already present in PD patients. In this regard, cognitive training (CT) is a relatively new and prominent therapeutic option with accumulating scientific support and increasing public awareness. Research has now established benefits across many different populations, and trials investigating the use of CT specifically in PD are becoming more common. We offer a brief summary of CT and its efficacy in PD samples to date, as well as discuss areas requiring further exploration in this group. Crucially, we suggest that CT should be supported as a research priority in PD, given both proven and potential benefits as a noninvasive and well-tolerated behavioral intervention for cognitive impairment.