Background Investigator salary at San Joaquin County

The average background investigator salary at San Joaquin County was $41,455 , which is 14 percent lower than the average salary for this job in California, and 14 percent lower than the national average for this job . Background Investigator salaries at San Joaquin County typically range from $24,254 to $52,510 (25th to 75th percentile). The highest reported background investigator salary was $135,424. There are 39 employees at San Joaquin County with the job title background investigator.