Background Investigator salary at San Joaquin County

The average background investigator salary at San Joaquin County was $46,986 , which is 29 percent lower than the average salary for this job in California, but 2 percent higher than the national average for this job . Background Investigator salaries at San Joaquin County typically range from $25,386 to $54,688 (25th to 75th percentile). The highest reported background investigator salary was $129,289. There are 37 employees at San Joaquin County with the job title background investigator.