Bostancı is a neighbourhood in the municipality and district of Kadıköy, Istanbul Province, Turkey. Its population is 33,638 (2022). It is on the Anatolian side of Istanbul, on the shore of the Sea of Marmara. As the easternmost neighbourhood of the Kadıköy district; it borders Suadiye and Kozyatağı to the west, İçerenköy to the north, and Altıntepe to the east.

Kadıköy is a municipality and district on the Asian side of Istanbul Province, Turkey. Its area is 25 km2, and its population is 467,919 (2023). It is a large and populous area in the Asian side of Istanbul, on the northern shore of the Sea of Marmara. It partially faces the historic city centre of Fatih on the European side of the Bosporus. It is bordered by the districts of Üsküdar, to the northwest, Ataşehir, to the northeast, and Maltepe, to the southeast.