The average Dallas County clerk salary was $41,570, which is 2 percent lower than the average salary for this job in Iowa, but 15 percent higher then the average salary for this job nationwide. Clerk salary in Dallas County is usually between $46,621 and $50,800 (25th and 75th). The highest clerk salary in Dallas County was $51,118. There are 5 employees in Dallas County whose job title is clerk.