Highest salary at Massac County in year 2023 was $149,421. Number of employees at Massac County in year 2023 was 80. Average annual salary was $48,007 and median salary was $51,525. Massac County average salary is 2 percent higher than USA average and median salary is 18 percent higher than USA median salary. From 2022 to 2023, the average salary of employees at this employer increased 8.3 percent, the median salary increased 5.2 percent.