The average clerk salary at Butler County was $5,345 , which is 88 percent lower than the average salary for this job in Pennsylvania, and 86 percent lower than the national average for this job . Clerk salaries at Butler County typically range from $744 to $9,947 (25th to 75th percentile). The highest reported clerk salary was $9,946. There are 3 employees at Butler County with the job title clerk.