National Chemistry Week is a community based program of the American Chemical Society (ACS). This annual event unites ACS local sections, businesses, schools, and individuals in communicating the importance of chemistry to our quality of life.

The mission of National Chemistry Week is to reach the public, particularly elementary and secondary school children, with positive messages about chemistry to:
National Chemistry Week is administered by the ACS Office of Volunteer Support which is part of the Membership and Scientific Advancement Division. The Committee on Community Activities serves as the advisory group for ACS Community Programs.
National Chemistry Week occurs annually the fourth week of October.
Themes are selected by members of the ACS Committee on Community Activities.