UpAlphabetical listing of Places in Ilocos Sur
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Kabugao | city | Ilocos Sur | Philippines | 17.79 | 120.46 | 42 | 49378 |
| Kacarsil | city | Ilocos Sur | Philippines | 17.81 | 120.49 | 118 | 40687 |
| Kakaldingan | city | Ilocos Sur | Philippines | 17.48 | 120.49 | 82 | 34937 |
| Kakarsi | city | Ilocos Sur | Philippines | 17.81 | 120.49 | 118 | 40687 |
| Kakil | city | Ilocos Sur | Philippines | 16.92 | 120.56 | 3349 | 11182 |
| Kalumsing | city | Ilocos Sur | Philippines | 17.27 | 120.56 | 328 | 13354 |
| Karkarsi | city | Ilocos Sur | Philippines | 17.81 | 120.49 | 118 | 40687 |
| Kasar | city | Ilocos Sur | Philippines | 17.82 | 120.49 | 223 | 37466 |
| Kasili | city | Ilocos Sur | Philippines | 17.66 | 120.38 | 22 | 29114 |
| Katucdaan | city | Ilocos Sur | Philippines | 17.79 | 120.48 | 95 | 46664 |
| Ken Fepmin | city | Ilocos Sur | Philippines | 17.07 | 120.49 | 164 | 42898 |
| Ken Fermin | city | Ilocos Sur | Philippines | 17.07 | 120.49 | 164 | 42898 |
| Kenmarin | city | Ilocos Sur | Philippines | 17.10 | 120.55 | 1669 | 17315 |
| Kiat | city | Ilocos Sur | Philippines | 16.87 | 120.52 | 830 | 18153 |
| Kilang | city | Ilocos Sur | Philippines | 17.18 | 120.47 | 95 | 51393 |
| Kimposa | city | Ilocos Sur | Philippines | 16.98 | 120.52 | 265 | 22146 |
| Kinamantirisan | city | Ilocos Sur | Philippines | 17.62 | 120.44 | 16 | 65883 |
| Kinapian | city | Ilocos Sur | Philippines | 16.93 | 120.59 | 2746 | 6745 |
| Kingking | city | Ilocos Sur | Philippines | 17.17 | 120.68 | 1669 | 3505 |
| Kinlayan | city | Ilocos Sur | Philippines | 17.64 | 120.45 | 265 | 52578 |
| Kota Candon | city | Ilocos Sur | Philippines | 17.19 | 120.45 | 59 | 43760 |
| Kota Vigan | city | Ilocos Sur | Philippines | 17.57 | 120.39 | 16 | 93880 |
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