The average clerk salary at Henry County was $51,228 , which is 20 percent higher than the average salary for this job in Iowa, and 33 percent higher than the national average for this job . Clerk salaries at Henry County typically range from $45,324 to $57,577 (25th to 75th percentile). The highest reported clerk salary was $63,335. There are 10 employees at Henry County with the job title clerk.