Highest City Of Clayton employee salary in year 2018 was $203,828. City Of Clayton employees number in year 2018 was 29. City Of Clayton average salary was $64,970 and median salary was $58,978. According to the last payroll, City Of Clayton average salary is 13 percent lower than USA average and 33 percent lower than California state average. City Of Clayton employee salaries are usually between $33,330 and $89,318. Top 10% of highest-earning employees have salaries ranging from $120,066 to $203,828.