Highest salary at Renwick in year 2018 was $121,201. Number of employees at Renwick in year 2018 was 135. Average annual salary was $52,374 and median salary was $52,160. Renwick average salary is 12 percent higher than USA average and median salary is 20 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 5.9 percent, the median salary increased 7.1 percent.