Highest salary at Town of Grantham in year 2022 was $96,929. Number of employees at Town of Grantham in year 2022 was 21. Average annual salary was $55,634 and median salary was $51,666. Town of Grantham average salary is 19 percent higher than USA average and median salary is 19 percent higher than USA median salary. From 2021 to 2022, the average salary of employees at this employer increased 9.5 percent, the median salary increased 0.5 percent.