Highest salary at Eureka in year 2018 was $108,500. Number of employees at Eureka in year 2018 was 63. Average annual salary was $52,846 and median salary was $50,180. Eureka average salary is 13 percent higher than USA average and median salary is 15 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 2.0 percent, the median salary increased 4.4 percent.