Highest salary at Collier County in year 2020 was $229,234. Number of employees at Collier County in year 2020 was 2,784. Average annual salary was $52,865 and median salary was $50,276. Collier County average salary is 13 percent higher than USA average and median salary is 16 percent higher than USA median salary. From 2019 to 2020, the median salary increased 0.4 percent.