Highest salary at Renwick in year 2017 was $115,182. Number of employees at Renwick in year 2017 was 139. Average annual salary was $49,480 and median salary was $48,709. Renwick average salary is 6 percent higher than USA average and median salary is 12 percent higher than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 11.8 percent, the median salary increased 3.1 percent.