| population | |
| Ayancik | 22611 |
| Boyabat Ilcesi | 43838 |
| Dikmen Ilcesi | 6138 |
| population | |
| Duragan Ilcesi | 20562 |
| Erfelek Ilcesi | 11490 |
| Gerze Ilcesi | 21924 |
| population | |
| Merkez | 58005 |
| Sarayduezue Ilcesi | 5617 |
| Tuerkeli Ilcesi | 14383 |
 | Sinop Airport | ~ 32.13 km |
| Kastamonu Airport | ~ 102.89 km |
| Amasya Merzifon Airport | ~ 117.99 km |
| Samsun-Çarşamba Airport | ~ 152.46 km |
| Tokat Airport | ~ 205.51 km |
| Zonguldak Çaycuma Airport | ~ 233.07 km |
| Esenboğa International Airport | ~ 241.22 km |
| Etimesgut Air Base | ~ 273.28 km |
| Sivas Nuri Demirağ Airport | ~ 276.83 km |
