Iōjima

Iōjima may refer to:
 * An island known as Iwo Jima in English. In Japanese, it is officially known as Iōtō, although at one point it was officially also Iōjima
 * Iōjima, Tokyo, a former village in Tokyo on the same island
 * Iōjima, Kagoshima, one of the three islands that forms the village of Mishima, Kagoshima, Japan; one of the Ōsumi Islands
 * Iōjima, Nagasaki, a former town in Nagasaki Prefecture, Japan