Calcium iodate is any of two inorganic compounds with the formula Ca(IO3)2(H2O)x, where x = 0 or 1.

A third mineral form of calcium iodate is dietzeite, a salt containing chromate with the formula Ca2(IO3)2CrO4.

Lautarite, described as the most important mineral source of iodine, is mined in the Atacama Desert.

Calcium iodate is used as an iodine supplement in chicken feed.

[1] Ethylenediamine dihydroiodide (EDDI) is a more typical source of nutritional iodine.