Which organization administers the workers' compensation system in Washington?

The agency responsible for administering the workers' compensation system in Washington is the Washington Department of Labor and Industries. This department oversees the state's workers' compensation insurance program, which provides benefits to workers who are injured or become ill due to their job.

The Department of Labor and Industries handles various functions including the acceptance of claims, the management of medical care, and the provision of wage loss benefits. It plays a critical role in ensuring that injured workers receive the necessary support, while also working to promote workplace safety and prevent accidents.

The other organizations mentioned have different focuses: the Washington State Insurance Commission primarily regulates the insurance industry, the Washington Employment Security Department addresses unemployment benefits and job placement, and labor unions represent the interests of workers but do not administer the workers' compensation system.