吉打州（马来语：Kedah）位于马来西亚（马来半岛）西北部，北部与玻璃市州和泰国的宋卡府及惹拉府为邻，南部和西南部与霹雳州及槟城州为邻。

吉打州被暹罗统治的时期，被称为Syburi（泰语：ไทรบุรี）。

加上浮罗交怡岛的吉打总面积约9425平方公里，总人口约1778188人。2003年的种族比例是：马来人（1,336,352人）、华人（252,987人）、印度人（122,911人）、非公民（35,293）和其他（27,532）。

吉打州的首府是亚罗士打（Alor Setar）。其他的主要城市有双溪大年（Sungai Petani）和居林（Kulim）。位于岸外的浮罗交怡岛（Langkawi，汉语圈常译为兰卡威）是吉打州的一个著名的旅游胜地。

Kedah (Malay pronunciation: [kʰəˈdɑh]; also known by its honorific, Darul Aman, or "Abode of Peace") is a state of Malaysia, located in the northwestern part of Peninsular Malaysia. The state covers a total area of over 9,000 km², and it consists of the mainland and Langkawi. The mainland has a relatively flat terrain, which is used to grow rice. Langkawi is an archipelago of islands, most of which are uninhabited. Kedah was called Kadaram (Tamil:காடாரம்) by ancient and medieval Tamil people and Syburi (Thai:ไทรบุรี; rtgs: Sai Buri) by the Siamese when it was under their influence.