The average salary of a dietitian in 2010 is $50,250 per year. In general, dietitians earn a salary between $43,000 and $57,000 per year. Dietitians rely on several factors when determining their individual salaries. These factors include the size or wealth of their employer, their level of skill, their fame, and their years of experience. A dietitian working with middle-class clientele will generally make a lot less than a dietitian to the stars.