How much does an Asst. Professor - Dentistry make in Washington? The average Asst. Professor - Dentistry salary in Washington is $93,451 as of November 25, 2019, but the range typically falls between $75,396 and $112,650. Salary ranges can vary widely depending on the city and many other important factors, including education, certifications, additional skills, the number of years you have spent in your profession.