Trooper First Class salary at State Police of Illinois

The average trooper first class salary at State Police of Illinois was $116,458 , which is 1 percent lower than the average salary for this job in Illinois, but 18 percent higher than the national average for this job . Trooper First Class salaries at State Police of Illinois typically range from $102,497 to $126,837 (25th to 75th percentile). The highest reported trooper first class salary was $211,597. There are 413 employees at State Police of Illinois with the job title trooper first class.