格拉摩根（英语：Glamorgan，威尔斯语：Morgannwg [mɔrˈɡanʊɡ]），又称格拉摩根郡，是威尔斯的13个历史上的郡之一，也是威尔斯的行政区划。格拉摩根地区最初是以农牧业为主的地区。不过16世纪之后，由于这里的自然资源，格拉摩根成为工业革命中威尔斯最早工业化的地区，也成为威尔斯人口最密集的地区。格拉摩根地区面积2,100 km（811 sq mi），1991年有人口1,288,309.。卡迪夫和斯旺西是格拉摩根地区的两大城市。

Glamorgan (/ɡləˈmɔːrɡən/) or, sometimes, Glamorganshire (Welsh:Morgannwg [mɔrˈɡanʊɡ] or Sir Forgannwg [ˈsiːr vɔrˈɡanʊɡ]) is one of the thirteen historic counties of Wales and a former administrative county of Wales. It was originally an early medieval petty kingdom of varying boundaries known as Glywysing until taken over by the Normans as a lordship. Glamorgan is latterly represented by the three preserved counties of Mid Glamorgan, South Glamorgan and West Glamorgan. The name also survives in that of Vale of Glamorgan, a county borough.