卡尔姆特豪特（荷兰语：Kalmthout）是位于比利时安特卫普省部的一座城市，人口17,489人（2006年）。总面积59.45平方公里，人口密度是每公里294人。

Kalmthout (Dutch pronunciation:[ˈkɑlmtɦʌu̯t]) is a municipality in the Belgian province of Antwerp. The municipality comprises the villages of Kalmthout, Achterbroek and Nieuwmoer. On January 1, 2007 Kalmthout had a population of 17,508. The total area is 59.45 square kilometres (22.95 sq mi). Kalmthout has a population density of 294 inhabitants per km².