TCDD may refer to any of the following:
- Turkish State Railways (Türkiye Cumhuriyeti Devlet Demiryolları) - The national railway carrier of Turkey.
- TCDD Taşımacılık - A Turkish transport company responsible for railway operations.
- 2,3,7,8-Tetrachlorodibenzodioxin — a type of dioxin.
- Texas Council for Developmental Disabilities
This disambiguation page lists articles associated with the title TCDD.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: