The average laborer salary at Polk County was $35,579 , which is 29 percent higher than the average salary for this job in Missouri, but 36 percent lower than the national average for this job . Laborer salaries at Polk County typically range from $33,696 to $37,024 (25th to 75th percentile). The highest reported laborer salary was $40,560. There are 10 employees at Polk County with the job title laborer.