卡维尔盐漠（波斯语：دشت كوير‎，Dasht-e Kavir）也称卡维尔沙漠或大盐漠，是伊朗高原中部的一处大荒漠。东西长450公里以上，南北宽100～200公里，总面积达77,600 平方公里。平均海拔约800米。沙漠内部盐沼广布，“卡维尔”波斯语意即“盐沼”。

Dasht-e Kavir (Persian:دشت كوير‎‎, lit. 'Low Plains' in classical Persian, from khwar (low), and dasht (plain), flatland), also known as Kavir-e Namak (lit. 'salty lowlands') and the Great Salt Desert, is a large desert lying in the middle of the Iranian plateau. It is about 800 km (500 mi) and 320 km (200 mi) with a total surface area of about 77,600 km (30,000 sq mi), making it the Earth's 23rd largest desert. The area of this desert stretches from the Alborz mountain range in the north-west to the Dasht-e Lut in the south-east and is partitioned between the Iranian provinces of Khorasan, Semnan, Tehran, Isfahan and Yazd.