Recent research has revealed roles for the PPAR family of transcription factors in the modulation of the RAAS. In particular, PPARα and PPARγ have been shown to control the transcription of renin in several tissues and influence the activity of local renin-angiotensin-systems coupling vascular and metabolic functions and contributing to their modulation. In this conceptual framework, PPAR and local RAS participate in the pathophysiology of blood pressure elevation, as well as in organ and tissue damage, and disturbances of glucose and lipid metabolism associated with cardiovascular diseases and obesity. The understanding of these mechanisms here discussed and their adequate pharmacological manipulation enlarge the potential to intervene pathological processes that connect the obesity with associate diseases and could alert about the adverse effects of some PPAR agonists on involved organs.