Highest salary at Massac County in year 2022 was $144,081. Number of employees at Massac County in year 2022 was 82. Average annual salary was $44,349 and median salary was $48,980. Massac County average salary is 5 percent lower than USA average and median salary is 13 percent higher than USA median salary. From 2021 to 2022, the average salary of employees at this employer increased 0.7 percent, the median salary increased 3.9 percent.