Highest salary at Union Gap in year 2017 was $122,494. Number of employees at Union Gap in year 2017 was 81. Average annual salary was $46,727 and median salary was $46,452. Union Gap average salary is the same as USA average and median salary is 7 percent higher than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 4.4 percent, the median salary increased 10.1 percent.