Highest salary at Peoria County in year 2021 was $177,585. Number of employees at Peoria County in year 2021 was 685. Average annual salary was $50,999 and median salary was $46,251. Peoria County average salary is 9 percent higher than USA average and median salary is 6 percent higher than USA median salary. From 2020 to 2021, the average salary of employees at this employer increased 10.5 percent, the median salary increased 4.5 percent.