碘酸钙（化学式：Ca(IO₃)₂）是一种无机化合物。在智利的阿他加马沙漠发现。

碘在酸性条件下被氯酸钾氧化成碘酸氢钾：

2KClO₃+HCl+I₂==KIO₃·HIO₃+Cl₂↑+KCl

经氢氧化钾中和后，与氯化钙反应生成碘酸钙。

KIO₃·HIO₃+KOH==2KIO₃+H₂O

2KIO₃+CaCl₂==Ca(IO₃)₂↓+2KCl

产生的氯气用氢氧化钾溶液中和后再利用：

Cl₂+2KOH==KCl+KClO₃+H₂O

Calcium iodate are inorganic compound composed of calcium and iodate anion. Two forms are known, anhydrous Ca(IO₃)₂ and the monohydrate Ca(IO₃)₂(H₂O). Both are colourless salts that occur naturally as the minerals called lautarite and bruggenite, respectively. A third mineral form of calcium iodate is dietzeite, a salt containing chromate with the formula Ca₂(IO₃)₂CrO₄.