Highest salary at Collier County in year 2021 was $302,763. Number of employees at Collier County in year 2021 was 2,365. Average annual salary was $51,560 and median salary was $51,547. Collier County average salary is 10 percent higher than USA average and median salary is 19 percent higher than USA median salary. From 2020 to 2021, the median salary increased 2.5 percent.