Highest salary at Town of Grantham in year 2023 was $104,476. Number of employees at Town of Grantham in year 2023 was 22. Average annual salary was $56,141 and median salary was $53,794. Town of Grantham average salary is 20 percent higher than USA average and median salary is 24 percent higher than USA median salary. From 2022 to 2023, the average salary of employees at this employer increased 0.9 percent, the median salary increased 4.1 percent.