 | Liva Suite Hotel Istanbul | Boutique | 14 | New City |
 | L'Onde Business Suites Hotel Istanbul | Aparthotel 4* | 25 | New City |
 | Loor Hotel Istanbul | 3.0 star rating | 12 | Old City |
 | Louis Appartements Galata Hotel Istanbul | Boutique | 12 | New City |
 | Louis Appartements Pera Hotel Istanbul | Boutique | 10 | New City |
 | Luce Di Pera Hotel Istanbul | Boutique | 9 | New City |
 | Lush Hotel Taksim Istanbul | Boutique | 44 | New City |
 | Lush Houses Mis Street Hotel Istanbul | Apartment 3rd Category | 9 | New City |
 | Mac Hotel Vazo Kule Istanbul | 5.0 star rating | 70 | Asian Side |
| Magnaura House Hotel Istanbul | Boutique | 12 | Old City |
| Magnificent Hotel Istanbul | 3.0 star rating | 11 | Old City |
| Malabadi Beyazit Hotel Istanbul | 3.0 star rating | 24 | Old City |
 | Malta Bosphorus By Molton Hotels Istanbul | Boutique | 25 | New City |
| Manesol Boutique Galata Hotel Istanbul | Boutique | 73 | New City |
 | Manesol Fuar Beylikduzu Hotel Istanbul | 4.0 star rating | 162 | Marmara |
 | Manesol Oldcity Bosphorus Hotel Istanbul | Boutique | 28 | Old City |
 | Mangana Konak Hotel Istanbul | Boutique | 17 | Old City |
 | Maral Hotel Istanbul | 3.0 star rating | 24 | Old City |
 | Marble Hotel Istanbul | 4.0 star rating | 89 | New City |
 | Mare Park Hotel Istanbul | 4.0 star rating | 60 | New City |
| Marine House Hotel Istanbul | Boutique | 14 | Asian Side |
 | Marinem Hotel Istanbul | 3.0 star rating | 70 | Old City |
 | Mari Time Hotel Istanbul | Boutique | 14 | Old City |
 | Marmara Deluxe Hotel Istanbul | Boutique | 29 | Old City |
 | Marmara Place Old City Hotel Istanbul | 4.0 star rating | 41 | Old City |
 | Marmaray Hotel Istanbul | 4.0 star rating | 93 | Old City |
| Maroon Bosphorus Suite Hotel Istanbul | Boutique | 9 | New City |
 | Maroon Hotel Pera Istanbul | Boutique | 25 | New City |
 | Marti Apartments Hotel Istanbul | Pending Category | 7 | Ataturk Airport Istanbul |
 | Marti Istanbul Hotel | 5.0 star rating | 270 | New City |
 | Martinenz Hotel Istanbul | 3.0 star rating | 90 | Old City |
 | Martinenz Residence Hotel Istanbul | Residence | 10 | Old City |
 | Mövenpick Hotel Istanbul Golden Horn | 5.0 star rating | 136 | Old City |
 | Mövenpick Istanbul Hotel | 5.0 star rating | 249 | New City |
 | May Hotel Istanbul | 3.0 star rating | 21 | Old City |
 | Maywood Hotel Istanbul | Boutique | 57 | Old City |
 | Meddusa Hotel Istanbul | 2.0 star rating | 13 | Old City |
 | Megara Palace - Old City Hotel Istanbul | 3.0 star rating | 22 | Old City |
 | Mega Residence Hotel Istanbul | Boutique | 23 | New City |
 | Melek Hotels Moda Istanbul | Boutique | 15 | Ataturk Airport Istanbul |
 | Melek Hotels Pera Istanbul | Boutique | 9 | Asian Side |
 | Melita Hotel Istanbul | 3.0 star rating | 32 | Old City |
 | Mercia Hotels & Resort Istanbul | 4.0 star rating | 89 | Marmara |
| Mercure Istanbul Airport Hotel | 4.0 star rating | 377 | Ataturk Airport Istanbul |
 | Mercure Istanbul Altunizade Hotel | 5.0 star rating | 140 | Asian Side |
 | Mercure Istanbul Bomonti Hotel | 5.0 star rating | 203 | New City |
 | Mercure Istanbul City Bosphorus Hotel | 5.0 star rating | 241 | New City |
 | Mercure Istanbul Taksim Hotel | 4.0 star rating | 137 | New City |
 | Mercure Istanbul Topkapi Hotel | 5.0 star rating | 204 | Ataturk Airport Istanbul |
 | Merial Hotel Istanbul | 3.0 star rating | 11 | Old City |