 | Aegean Houses Hotel Kos | 4.0 star rating | 55 | Lambi |
 | Aegean View Aqua Resort Kos | 4.0 star rating | 217 | Psalidi |
 | Aegean village Hotel Kos | 4.0 star rating | 330 | Kardamena |
 | Aeolos Beach Hotel Kos | 4.0 star rating | 183 | Lambi |
 | Agela Apartments Hotel Kos | 3.0 star rating | 46 | Kos Town |
 | Agrelli Hotel Imperial Kos | 3.0 star rating | 40 | Kardamena |
 | Agrellis Apartments Hotel Kos | 3.0 star rating | 15 | Kardamena |
 | Akti Beach Club Ultra All Inclusive Hotel Kos | 4.0 star rating | 367 | Kardamena |
 | Akti Dimis Hotel Kos | 2.0 star rating | 36 | Tigaki |
 | Akti Palace Ultra All Inclusive Hotel Kos | 5.0 star rating | 189 | Kardamena |
| Albatros Studios Hotel Kos | 2.0 star rating | 10 | Kefalos |
 | Alexandra Hotel Kos | 4.0 star rating | 62 | Kos Town |
 | Alexandra beach Hotel Kos | 4.0 star rating | 135 | Aghios Gavriil |
 | Ammos Resort Kos | 4.0 star rating | 30 | Kos Town |
 | Anastasia Hotel Kos | 2.0 star rating | 77 | Kos Town |
 | Andavis Hotel Kos | 2.0 star rating | 24 | Kardamena |
 | Andromeda Hotel Kos | 3.0 star rating | 24 | Psalidi |
| Anemones Studios Hotel Kos | 2 Keys | 8 | Kefalos |
| Angela Hotel Kos | 2 Keys | 48 | Kos Town |
| Angela Apartment Hotel Kos | 3.0 star rating | 37 | Kos Town |
 | Anna Hotel Kos | 3.0 star rating | | Lambi |
| Anneta Hotel Kos | 3.0 star rating | 20 | Kos Town |
 | Anthoula Hotel Kos | 2.0 star rating | 60 | Kefalos |
| Anthoulis Hotel Kos | 2 Keys | 20 | Kefalos |
| Apollonia Hotel Kos | 3.0 star rating | 15 | Marmari |
 | Apollon Kos Hotel | 4.0 star rating | 161 | Lambi |
 | Aqua Blu Boutique Hotel & Spa Kos | 5.0 star rating | 53 | Lambi |
 | Archipelagos Hotel Kos | 3.0 star rating | 113 | Aghios Fokas |
 | Archodia Studios Hotel Kos | 3.0 star rating | 18 | Kefalos |
 | Argiri Hotel Apartments Kos | 2.0 star rating | 11 | Kardamena |
| Argyros Garden Hotel Kos | 2 Keys | 3 | Kefalos |
 | Aslanis Village Hotel Kos | 3.0 star rating | 40 | Marmari |
 | Aspro Spiti Hotel Kos | 3.0 star rating | 27 | Tigaki |
 | Asteras Resort Kos | 4.0 star rating | 108 | Kardamena |
 | Astron Hotel Kos | 3.0 star rating | 68 | Kos Town |
 | Athinoula Hotel Kos | 2.0 star rating | 41 | Kefalos |
| Atlantica Holiday Village Hotel Kos | 4.0 star rating | 341 | Marmari |
 | Atlantica Magic Life Marmari Palace Hotel Kos | 5.0 star rating | 329 | Mastichari |
 | Atlantica Porto Bello Beach Hotel Kos | 5.0 star rating | 294 | Kardamena |
 | Atlantica Thalassa Hotel Kos | 3.0 star rating | 138 | Lambi |
 | Atlantis Hotel Kos | 4.0 star rating | 256 | Lambi |
| BLACK DIAMOND Hotel Kos | 2.0 star rating | 15 | Kos Town |
 | Black Diamonds Hotel Kos | 3 Keys | 34 | Tigaki |
| Blue Jay Beach Hotel Kos | 3.0 star rating | 56 | Marmari |
 | Blue Lagoon Resort Kos | 5.0 star rating | 662 | Lambi |
 | Blue Lagoon Village Hotel Kos | 5.0 star rating | 366 | Kefalos |
| Blue Nest Hotel Kos | 3.0 star rating | | Tigaki |
 | Blue nest kos Hotel Kos | 3.0 star rating | 37 | Tigaki |
 | Boheme Hotel Kos | 2.0 star rating | 70 | Lambi |
 | Bouradanis Hotel Kos | 3.0 star rating | 22 | Marmari |