Bostancı (Turkish: [bosˈtandʒɯ]) is a neighborhood in the municipality and district of Kadıköy, Istanbul Province, Turkey.

[3] A predominantly residential area, Bostancı is an important transport interchange with stops on the Marmaray and M4 Metro lines and ferries leaving for the Princes' Islands in the Sea of Marmara.

It is generally considered the starting point of Bağdat Avenue, the major shopping street that runs as far as Kadıköy.

Several places stay open all night serving people returning from the bars and clubs on Bağdat Avenue.

[citation needed] During the Ottoman period, the main road connecting the Istanbul to Anatolia passed through Bostancı, which was the eastern border of the city.

For Bostancı, one of the most significant of these summer houses was the mansion (köşk) of Sadi Bey, an accountant in the Ministry of Public Works.