Sultanbeyli is a municipality and district located in the Istanbul Province of Turkey. Situated inland on the Asian side of the city, it serves as a landlocked residential area covering a total area of 29 km2. As of 2022, the district has a population of 358,201.
The district is bordered by Sancaktepe to the west, Pendik to the east, and Kartal to the south-west. It is currently governed by Mayor Ali Tombaş of the Justice and Development Party. Public transportation within the area includes two metro stations named Hasanpaşa and Sultanbeyli.