How much does an Assoc. Professor - Liberal Arts make in North Dakota? The average Assoc. Professor - Liberal Arts salary in North Dakota is $68,631 as of November 25, 2019, but the range typically falls between $56,962 and $100,497. 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.