Highest salary at Winfield in year 2018 was $135,710. Number of employees at Winfield in year 2018 was 204. Average annual salary was $55,104 and median salary was $53,280. Winfield average salary is 18 percent higher than USA average and median salary is 23 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 3.5 percent, the median salary increased 4.2 percent.