古晋（马来语：Kuching）通称「古晋市」，是马来西亚砂拉越州的首府和马国自1988年以来的第四大城市，也是东马乃至婆罗洲全岛境内最大的城市。

古晋位于北纬1度33分，东经110度25分，海拔27米（89英尺）。古晋是一座座落在砂拉越河岸边的一座城市，位于婆罗洲的西北部，砂拉越的南部。

Kuching /ˈkuːtʃɪŋ/ (Jawi: کوچيڠ‎, Chinese:古晉; pinyin:Gǔ Jìn), officially the City of Kuching, is the capital and the most populous city in the state of Sarawak in Malaysia. It is also the capital of Kuching Division. The city is situated on the Sarawak River at the southwest tip of the state of Sarawak on the island of Borneo and covers an area of 431 square kilometres (166 sq mi) with a population about 165,642 in the Kuching North administrative region and 159,490 in the Kuching South administrative region—a total of 325,132 people.