Maltepe is a municipality and district of Istanbul Province, Turkey. Its area is 53 km2, and its population is 528,544 (2022). It is on the northern shore of the Sea of Marmara, adjacent to the Kadıköy district to the west, Kartal district to the east and Ataşehir district to the northwest. The mayor of Maltepe is Ali Kılıç (CHP).
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.
Maltepe may refer to several places in Turkey:
Küçükyalı or Küçükyalı Merkez is a neighbourhood in the municipality and district of Maltepe, Istanbul Province, Turkey. Its population is 26,086 (2022). It is on the Asian side of Istanbul, on the coast of the Marmara Sea.
The M4, officially referred to as the M4 Kadıköy - Sabiha Gökçen Airport metro line, is a 33.5-kilometre (20.8 mi), 23-station rapid transit line of the Istanbul Metro. It is colored deep pink on the maps and route signs. Running between Kadıköy and Sabiha Gökçen Airport, it is the first rapid transit line operating on the Asian side of Istanbul. The M4 mostly runs under State road D100, parallel to the Istanbul-Ankara railway and is entirely underground.
Bayrampaşa—Maltepe is a rapid transit station on the M1 line of the Istanbul Metro. It is located in southern Eyüp, adjacent to the O-3 highway. An out-of-system connection Demirkapı station on the T4 light rail line is available as well as İETT buses.
Acıbadem is an underground station on the M4 line of the Istanbul Metro in the Acıbadem neighborhood of Kadıköy, Istanbul. Situated under the D.100 state highway, near Acıbadem Avenue. The station was opened on 17 August 2012 along with the Kadıköy-Kartal portion of the M4 line.
Ünalan is an underground station on the M4 line of the Istanbul Metro. Located beneath the Uzunçayır Interchange in the Hasanpaşa neighborhood of Kadıköy, Istanbul, it was opened on 17 August 2012 along with the. Connection to the Istanbul Metrobus is available from Ünalan.
Göztepe is an underground station on the M4 line of the Istanbul Metro. Located under beneath the Göztepe Interchange in the Merdivenköy neighborhood of Kadıköy, Istanbul, it was opened on 17 August 2012.
Yenisahra is an underground station on the M4 line of the Istanbul Metro. Located under beneath the D.100 state highway, just west of the Kozyatağı Interchange in the Sahrayı Cedit neighborhood of Kadıköy, Istanbul, it was opened on 17 August 2012. Connections to Havabüs express bus service to Sabiha Gökçen Airport are available.
Kozyatağı is an underground transfer station for the M4 line and the M8 line of the Istanbul Metro. Located under beneath the D.100 state highway in Kozyatağı, it was opened on 17 August 2012 for the M4 and on 6 January 2023 for the M8 line.
Bostancı is an underground station on the M4 line of the Istanbul Metro. Located under beneath the Bostancı Interchange in the Bostancı neighborhood of Kadıköy, Istanbul, it was opened on 17 August 2012. Bostancı is the largest metro station on the M4, consisting of three tracks and two platforms. Connections to IETT bus service is available on both levels of the interchange.
Küçükyalı is an underground station on the M4 line of the Istanbul Metro in Maltepe. It is located beneath the D.100 State Highway, in the Çınar neighborhood. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 17 August 2012.
Maltepe is an underground station on the M4 line of the Istanbul Metro in Maltepe. It is located beneath the Maltepe Interchange, on the D.100 State Highway, in the Zümrütevler neighborhood. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 17 August 2012.
Huzurevi is an underground station on the M4 line of the Istanbul Metro in Maltepe. It is located beneath the D.100 State Highway, in the Bağlarbaşı neighborhood. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 17 August 2012.
Gülsuyu is an underground station on the M4 line of the Istanbul Metro in Maltepe. It is located beneath the D.100 State Highway, just east of the Gülsuyu interchange, in the Cevizi neighborhood. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 17 August 2012.
Hastane - Adliye is an underground station on the M4 line of the Istanbul Metro in Kartal. It is located beneath the D.100 State Highway in the Esenkent neighborhood and is the westernmost metro station in Kartal. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 17 August 2012. It is located next to the Anatolian Palace of Justice.
Soğanlık is an underground station on the M4 line of the Istanbul Metro in Kartal. It is located beneath the D.100 State Highway in the Soğanlık Yeni neighborhood. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 17 August 2012.
Kartal is an underground station on the M4 line of the Istanbul Metro in Kartal. It is located beneath the Kartal interchange, along the D.100 State Highway in the Cumhuriyet neighborhood. Kartal was the eastern terminus of the M4 from its opening in 2012 to 2016, when the line was extended further to Pendik. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 17 August 2012.
Yakacık - Adnan Kahveci is an underground station on the M4 line of the Istanbul Metro in Kartal. It is located beneath the D.100 State Highway in the Hürriyet neighborhood and is the easternmost station in Kartal. Connection to IETT city buses and Istanbul Minibus service is available. The station consists of an island platform with two tracks and was opened on 10 October 2016.
M4 
İETT Bus: [1] 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 21K, 21U, 130, 130A, 130Ş, 500T, E-10, KM30, KM33
