More than a third (34%) of RDs work in hospitals, in inpatient and acute care. A significant percentage of RDs work in clinics (12%) and community and public health programs (11%). 11% work in extended care facilities. RDs can work as consultants to health-care facilities (6%) or other organizations (2%). RDs can work in private practice (4%). And, of course, RDs can work in school foodservice (3%), or in education (5%). RDs work in very diverse areas! (Data from recent AND survey.)
Check out this article from the Academy of Nutrition and Dietetics: What a Registered Dietitian Can Do For You.