TCDD
# TCDD

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
