Highest salary at Buchanan County in year 2020 was $143,190. Number of employees at Buchanan County in year 2020 was 259. Average annual salary was $37,211 and median salary was $38,424. Buchanan County average salary is 21 percent lower than USA average and median salary is 12 percent lower than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 1.2 percent, the median salary increased 2.5 percent.