| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Rancho | city | Province of Ilocos Sur | Philippines | 17.5030556 | 120.4130556 | 19 | 68022 |
| Raois | city | Province of Ilocos Sur | Philippines | 17.5666667 | 120.4333333 | 16 | 78350 |
| Rawis | city | Province of Ilocos Sur | Philippines | 17.5666667 | 120.4333333 | 16 | 78350 |
| Refaro | city | Province of Ilocos Sur | Philippines | 17.7630556 | 120.4436111 | 39 | 47112 |
| Ridos | city | Province of Ilocos Sur | Philippines | 17.8333333 | 120.45 | 3 | 37587 |
| Rivadavia | city | Province of Ilocos Sur | Philippines | 17.4166667 | 120.4833333 | 75 | 47768 |
| Rizal | city | Province of Ilocos Sur | Philippines | 17.5466667 | 120.4513889 | 157 | 78350 |
| Rizal | city | Province of Ilocos Sur | Philippines | 17.45 | 120.5166667 | 82 | 45796 |
| Ronda | city | Province of Ilocos Sur | Philippines | 17.1166667 | 120.45 | 45 | 35098 |
| Rubio | city | Province of Ilocos Sur | Philippines | 17.1833333 | 120.4833333 | 88 | 49346 |
| Rugsuanan | city | Province of Ilocos Sur | Philippines | 17.5666667 | 120.4166667 | 16 | 78350 |
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