The average sergeant salary at Linn County was $115,052 , which is 21 percent lower than the average salary for this job in Oregon, and 18 percent lower than the national average for this job . Sergeant salaries at Linn County typically range from $110,405 to $120,577 (25th to 75th percentile). The highest reported sergeant salary was $124,675. There are 5 employees at Linn County with the job title sergeant.