Highest salary at Peoria County in year 2019 was $161,883. Number of employees at Peoria County in year 2019 was 855. Average annual salary was $45,367 and median salary was $44,221. Peoria County average salary is 3 percent lower than USA average and median salary is 2 percent higher than USA median salary. From 2018 to 2019, the average salary of employees at this employer increased 1.8 percent, the median salary increased 1.8 percent.