Security Officer salary at St. Louis County

The average security officer salary at St. Louis County was $50,540 , which is 44 percent higher than the average salary for this job in Missouri, and 13 percent higher than the national average for this job . Security Officer salaries at St. Louis County typically range from $42,392 to $60,858 (25th to 75th percentile). The highest reported security officer salary was $103,101. There are 55 employees at St. Louis County with the job title security officer.