碘化钡（英文：Barium iodide）是分子式为BaI₂的无机化合物，为白色固体。分两种型态，一种是水合物，另一种是无水物，都是白色的固体，无水物可由含水碘化钡加热得到。

Barium iodide is an inorganic compound with the formula BaI₂. The compound exists as an anhydrous and a hydrate (BaI₂(H₂O)₂), both of which are white solids. When heated, hydrated barium iodide converts to the anhydrous salt. The hydrated form is freely soluble in water, ethanol, and acetone.