 | Helona Resort Kos | 5.0 star rating | 238 | Kardamena |
| Horizon Beach Resort Kos | 4.0 star rating | 324 | Mastichari |
 | Hotel Hermes Kos | 3.0 star rating | | Marmari |
 | Ilios Aparthotel Hotel Kos | 3.0 star rating | 130 | Tigaki |
 | Imperial Hotel Kos | 2.0 star rating | 86 | Kos Town |
 | International Hotel Kos | 2.0 star rating | 65 | Kos Town |
| Ionikos Hotel Kos | 3.0 star rating | 41 | Kefalos |
 | Irene Studios Hotel Kos | 2 Keys | 10 | Kefalos |
 | Irina Beach Hotel Kos | 3.0 star rating | 43 | Tigaki |
 | Iris Hotel Kos | 3.0 star rating | 30 | Psalidi |
 | Island Resorts Valynakis Beach Kos | 3.0 star rating | 87 | Kardamena |
 | Jonathan Apartments Hotel Kos | 2 Keys | 14 | Kos Town |
 | Kalimera Mare Hotel Kos | 3.0 star rating | 43 | Kardamena |
 | Kardamos Hotel Kos | 2.0 star rating | 108 | Kardamena |
| Katerinas Garden Hotel Kos | 2 Keys | 2 | Kefalos |
| Kipriotis Aqualand Hotel Kos | 4.0 star rating | | Psalidi |
 | Kipriotis Hippocrates Hotel Kos | 4.0 star rating | 174 | Psalidi |
 | Kipriotis Maris Suites Hotel Kos | 5.0 star rating | 144 | Psalidi |
 | Kipriotis Panorama and Suites Hotel Kos | 5.0 star rating | 293 | Psalidi |
 | Kipriotis Panorama Aqualand Hotel Kos | 1 Star | 209 | Psalidi |
 | Kipriotis Village Resort Kos | 4.0 star rating | 651 | Psalidi |
 | Koala Hotel Kos | 2.0 star rating | 49 | Kos Town |
| Kokalakis Hotel Kos | 2.0 star rating | 36 | Kefalos |
 | Kontessa Apartments Hotel Kos | 2 Keys | 16 | Kefalos |
 | Kordistos Hotel Kos | 2.0 star rating | 40 | Kefalos |
 | Kos Aktis Hotel | 4.0 star rating | 42 | Kos Town |
 | Kos Bay Hotel | 2.0 star rating | 56 | Kos Town |
 | Kos Hotel Junior Suites | 4.0 star rating | 66 | Kos Town |
 | KOS PALACE HOTEL Hotel Kos | 4.0 star rating | 107 | Tigaki |
 | Kosta Palace Hotel | 4.0 star rating | 165 | Kos Town |
 | Kouros Palace Hotel Kos | 5.0 star rating | 195 | Mastichari |
| Kris Mari Hotel Kos | 3.0 star rating | 87 | Kardamena |
 | Labranda Marine Aquapark Resort Kos | 4.0 star rating | 298 | Lambi |
 | Lakitira Resort Kos | 4.0 star rating | 294 | Kardamena |
 | Lakitira Suites Hotel Kos | 5.0 star rating | 39 | Kardamena |
 | Laura Hotel Kos | 2.0 star rating | 37 | Lambi |
 | Lenaki Hotel Kos | 3 Keys | 42 | Lambi |
 | Leonidas Hotel And Studios Kos | 2.0 star rating | 30 | Kos Town |
 | Mammis Beach Hotel Kos | 3.0 star rating | 21 | Kardamena |
| Mamouzelos Hotel Apts Kos | 2.0 star rating | | Kardamena |
 | Manolis Studios Hotel Kos | 2.0 star rating | 14 | Kefalos |
 | Marianna Hotel Apartments Kos | 2.0 star rating | 55 | Tigaki |
| Marianna Studios Hotel Kos | 3.0 star rating | 55 | Tigaki |
 | Maritina Hotel Kos | 3.0 star rating | 83 | Kos Town |
 | Maritsa Studios Hotel Kos | 2 Keys | 18 | Kefalos |
 | Mastichari Bay Hotel Kos | 4.0 star rating | 257 | Mastichari |
| Matina Studios Hotel Kos | 2 Keys | 8 | Kefalos |
 | Michelangelo Resort and Spa Kos | 5.0 star rating | 254 | Aghios Fokas |
 | Michel Apartments Hotel Kos | 3.0 star rating | 34 | Kos Town |
 | Mikri Poli Hotel Kos | 5.0 star rating | 172 | Kardamena |