阿克套 （Ақтау,Aqtau‎）是哈萨克斯坦斯坦西部、里海沿岸的一个城市，也是曼格斯套州的首府。2006年人口约为175,000人。

城名在哈萨克斯坦语的意思是「白色悬崖」的意思。建于1961年，1963年设市。1964至1992年间被改名为舍甫琴柯以纪念乌克兰诗人塔拉斯·舍甫琴科。这地方本是土库曼斯坦人活动的地方，诺盖人，卡尔梅克人先后把他们逐出此地。

城市是因石油而创建的，由于起初是一座军事重镇，当地的街道没有名字，要寄信到当地就改为填写小区编号、大厦编号和单元号。当地曾设有BN-350反应堆，以生产钚元素，并为城市提供电力和海水淡化。

Aktau (Kazakh:Ақтау, Qazaq Latin Script: Aqtaw - White Mountain) was known as Shevchenko (Russian:Шевченко) from 1964 to 1991. Its current name means "white mountain" in Kazakh, which may be due to its cliffs that overlook the Caspian. Its former name was given due to the eponymous Ukrainian poet's period of exile in the area. It is the second largest city in western Kazakhstan and the country's main seaport on the Caspian Sea. It is located on the Mangyshlak Peninsula and is the capital of Mangystau Region. Population: 166,962 (2009 Census results); 143,396 (1999 Census results).