The average assistant salary at Upshur County was $68,403 , which is 92 percent higher than the average salary for this job in West Virginia, and 63 percent higher than the national average for this job . Assistant salaries at Upshur County typically range from $27,038 to $89,085 (25th to 75th percentile). The highest reported assistant salary was $89,085. There are 3 employees at Upshur County with the job title assistant.