卡德柯伊（Kadıköy）在古代和拜占庭帝国时期称为迦克墩，是土耳其伊斯坦布尔的一个人口众多的区，位于马尔马拉海的小亚细亚一侧，面对着博斯普鲁斯海峡欧洲一侧古老的市中心。

卡德柯伊也是该区最突出的街区的名称，那是一个住宅和商业区，有许多酒吧、电影院和书店，是安纳托利亚一侧的文化中心。

卡德柯伊在1928年成为一个区，从于斯屈达尔区分出。在同一年，İçerenköy、Bostancı和 Suadiye 从卡尔塔尔区分出，最终加入了新成立的卡德柯伊区。与其相邻的区为：西北方的于斯屈达尔区，东北方的乌姆拉尼耶，东南方的马尔泰佩以及卡尔塔尔。根据2007年人口统计，卡德柯伊区的人口为509,282人。

Kadıköy (Turkish pronunciation: [ˈkadɯcøj]; ancient and Byzantine Chalcedon (Greek:Χαλκηδών)), is a large, populous, and cosmopolitan district of Istanbul, Turkey on the northern shore of the Sea of Marmara, facing the historic city centre on the European side of the Bosporus. Kadıköy is also the name of the most prominent neighbourhood of the district, a residential and commercial area that, with its numerous bars, cinemas and bookshops, is the cultural centre of the Anatolian side of Istanbul. Kadıköy became a district in 1928 when it was separated from Üsküdar district. The neighbourhoods of İçerenköy, Bostancı and Suadiye were also separated from the district of Kartal in the same year, and eventually joined the newly formed district of Kadıköy. Its neighbouring districts are Üsküdar to the northwest, Ataşehir to the northeast, Maltepe to the southeast, and Kartal beyond Maltepe. The population of Kadıköy district, according to the 2007 census, is 509,282.