Typically, it takes between two and four years to become a dental hygienist. Some programs can be completed in 36 months or less, such as Herzing’s Bachelor of Science in Dental Hygiene program. You can potentially transfer credit from prior college courses to decrease how much time it takes to complete. Learn more about the Herzing Dental Hygiene programExplore Now Other Questions What makes a good physical therapist assistant? Can I become a forensic psychologist? What are the main differences between an LPN and RN? Does a bookkeeper have to be certified?