The Washington State Department of Social and Health Services (DSHS) is a state agency in the U.S. state of Washington. It is headquartered in Olympia and is the largest state agency in Washington. DSHS provides social and health services to the people of Washington through its many divisions and programs. The agency's mission is to improve the quality of life for individuals and families in need. DSHS is responsible for administering a wide range of programs, including those related to child welfare, mental health, developmental disabilities, aging and long-term care, and public health.