 | Katelya Hotel Istanbul | 3.0 star rating | 21 | Old City |
 | Kaya Ä°stanbul Fair&Convention Hotel Istanbul | 5.0 star rating | 317 | Ataturk Airport Istanbul |
 | Kaya Madrid Hotel Istanbul | 3.0 star rating | 34 | Old City |
 | Kemer Country Hotel Istanbul | Boutique | 35 | Old City |
 | Kent Hotel Istanbul | 4.0 star rating | 93 | Old City |
 | Kervansaray Istanbul Hotel | 3.0 star rating | 66 | New City |
 | Kestrel Park Hotel Istanbul | 2.0 star rating | 16 | Old City |
 | Keten Suites Taksim Hotel Istanbul | 4.0 star rating | 89 | New City |
 | Klas Hotel Istanbul | 4.0 star rating | 129 | Old City |
| Klassis Resort Istanbul | 5.0 star rating | 304 | Marmara |
| Konak Hotel Taksim Istanbul | 4.0 star rating | 117 | New City |
| Konak Suites Hotel Istanbul | Boutique | 6 | New City |
| KSuites Hotel Istanbul | 3.0 star rating | 23 | New City |
| Kuk Hotel Istanbul | 4.0 star rating | | Ataturk Airport Istanbul |
| Kumru Hotel Istanbul | 3.0 star rating | 9 | Old City |
 | Kupeli Hotel Istanbul | 3.0 star rating | 19 | Old City |
 | Kupeli Palace Hotel Istanbul | 3.0 star rating | 32 | Old City |
| Kuran Hotel International Istanbul | 3.0 star rating | 60 | Old City |
 | Kurfal Hotel Istanbul | Boutique | 32 | Asian Side |
 | Lady Diana Hotel Istanbul | 4.0 star rating | 75 | Old City |
 | Lalahan Hotel Istanbul | Boutique | 18 | Old City |
 | Laleli Blue Marmaray Hotel Istanbul | Boutique | 27 | Old City |
 | Laleli Gonen Hotel Istanbul | 3.0 star rating | 65 | Old City |
 | Lalinn Hotel Istanbul | 3.0 star rating | 10 | Old City |
 | Lamartine Hotel Istanbul | 4.0 star rating | 67 | New City |
 | Lampa Design Hotel Istanbul | 4.0 star rating | 20 | New City |
| Lancelot Hotel Istanbul | Boutique | 7 | Old City |
 | Lares Park Hotel Istanbul | 4.0 star rating | 164 | New City |
 | Lasagrada Hotel Istanbul | 5.0 star rating | 84 | New City |
 | Lausos Hotel Istanbul | Boutique | 34 | Old City |
 | Lavanta Hotel Istanbul | 3.0 star rating | 15 | New City |
 | La Villa Hotel Istanbul | 4.0 star rating | 28 | New City |
 | Lazzoni Hotel Istanbul | 5.0 star rating | 132 | New City |
 | Legacy Ottoman Hotel Istanbul | 5.0 star rating | 172 | Old City |
 | Legend Hotel Istanbul | 3.0 star rating | 22 | Old City |
 | Le Meridien Istanbul Etiler Hotel | 5.0 star rating | 259 | New City |
| Le Mirage Hotel Sisli Istanbul | Boutique | 38 | New City |
 | Lemon Residence Hotel Istanbul | Aparthotel 4* | 10 | Old City |
 | Le Petit Palace Hotel Istanbul | Pending Category | 28 | Old City |
| Le Safran Suite Hotel Istanbul | Boutique | 15 | Old City |
 | Les Ottomans Hotel Istanbul | Boutique | 10 | New City |
 | Levanten Hostel Hotel Istanbul | 3.0 star rating | 24 | New City |
 | Levni Hotel & Spa Istanbul | 4.0 star rating | 75 | Old City |
 | Leyenda Hotel Istanbul | Boutique | 20 | Old City |
 | Liberty Hotel Istanbul | 3.0 star rating | 31 | Old City |
 | Life Room Hotel Istanbul | 3.0 star rating | 19 | New City |
 | Limak Eurasia Luxury Hotel Istanbul | 5.0 star rating | 197 | Asian Side |
 | Lion Hotel Istanbul | 4.0 star rating | 104 | New City |
 | Lionel Hotel Istanbul | 5.0 star rating | 230 | Ataturk Airport Istanbul |
 | Listana Hotel Istanbul | 4.0 star rating | 54 | New City |