碘化钙，化学式CaI₂。

六水合碘化钙是一种无色至黄白色味苦有潮解性的结晶或粉末，易溶于水，微溶于乙醇、丙酮，水溶液呈中性。遇酸分解游离出碘或生成氢碘酸。六水物与碘化铵在碘化氢或干燥氮气流中加热脱水，可得无水物。

碘化钙会缓慢与空气中的氧气及二氧化碳反应，生成单质碘，从而使其颜色加深。

法国化学家亨利·莫瓦桑通过用纯金属钠还原碘化钙，首次制得了单质钙。

Calcium iodide (chemical formula CaI₂) is the ionic compound of calcium and iodine. This colourless deliquescent solid is a salt that is highly soluble in water. Its properties are similar to those for related salts, such as calcium chloride. It is used in photography. It is also used in cat food as a source of iodine.