Facilities Maintenance Supervisor salary at King County Library System

The average facilities maintenance supervisor salary at King County Library System was $97,722 , which is 6 percent lower than the average salary for this job in Washington, but 49 percent higher than the national average for this job . Facilities Maintenance Supervisor salaries at King County Library System typically range from $90,129 to $105,315 (25th to 75th percentile). The highest reported facilities maintenance supervisor salary was $105,315. There are 2 employees at King County Library System with the job title facilities maintenance supervisor.