| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Isabi | city | Madang | Papua New Guinea | -5.89 | 145.52 | 3349 | 1362 |
| Isago | city | Western | Papua New Guinea | -8.01 | 142.69 | 170 | 149 |
| Isagu | city | Western | Papua New Guinea | -8.01 | 142.69 | 170 | 149 |
| Isaguam | city | West Sepik | Papua New Guinea | -4.08 | 141.23 | 830 | 596 |
| Isan | city | Morobe | Papua New Guinea | -5.97 | 146.63 | 6272 | 1464 |
| Isapeape | city | Gulf | Papua New Guinea | -8.19 | 146.13 | 3 | 159 |
| Isara | city | Western | Papua New Guinea | -8.31 | 141.94 | 62 | 149 |
| Isariga | city | Madang | Papua New Guinea | -5.70 | 145.54 | 915 | 1341 |
| Isarikan | city | Madang | Papua New Guinea | -4.70 | 144.80 | 242 | 1341 |
| Isau | city | West Sepik | Papua New Guinea | -4.18 | 141.26 | 915 | 596 |
| Isaveni Blocks | city | Northern | Papua New Guinea | -8.75 | 148.13 | 830 | 855 |
| Isaveni Settlement Blocks | city | Northern | Papua New Guinea | -8.75 | 148.13 | 830 | 855 |
| Ise | city | Eastern Highlands | Papua New Guinea | -6.45 | 145.25 | 6797 | 3129 |
| Isenga | city | Western Highlands | Papua New Guinea | -5.58 | 144.57 | 2509 | 5364 |
| Isi | city | West Sepik | Papua New Guinea | -2.83 | 141.61 | 3 | 310 |
| Isi 1 | city | West Sepik | Papua New Guinea | -2.92 | 141.23 | 830 | 596 |
| Isi 2 | city | West Sepik | Papua New Guinea | -2.93 | 141.23 | 830 | 596 |
| Isi Number 1 | city | West Sepik | Papua New Guinea | -2.92 | 141.23 | 830 | 596 |
| Isi Number 2 | city | West Sepik | Papua New Guinea | -2.93 | 141.23 | 830 | 596 |
| Isiani | city | Gulf | Papua New Guinea | -7.20 | 143.93 | 830 | 298 |
| Isibi | city | Western | Papua New Guinea | -6.38 | 142.30 | 830 | 149 |
| Isina | city | Bougainville | Papua New Guinea | -6.42 | 155.69 | 2509 | 2235 |
| Isinai | city | Bougainville | Papua New Guinea | -6.42 | 155.69 | 2509 | 2235 |
| Isinsibi | city | Madang | Papua New Guinea | -4.76 | 145.15 | 1778 | 1341 |
| Isiu | city | Central | Papua New Guinea | -9.05 | 146.77 | 3 | 371 |
| Isoge | city | Northern | Papua New Guinea | -8.37 | 148.07 | 127 | 596 |
| Isogum | city | East Sepik | Papua New Guinea | -3.75 | 142.97 | 830 | 894 |
| Isontenu | city | Eastern Highlands | Papua New Guinea | -6.26 | 145.91 | 5357 | 21430 |
| Isosargan | city | Morobe | Papua New Guinea | -6.38 | 146.83 | 5029 | 1490 |
| Isowak | city | Madang | Papua New Guinea | -5.05 | 144.78 | 187 | 1341 |
| Isu | city | West Sepik | Papua New Guinea | -4.08 | 141.12 | 830 | 596 |
| Isu 1 | city | West Sepik | Papua New Guinea | -4.08 | 141.13 | 830 | 596 |
| Isu 2 | city | West Sepik | Papua New Guinea | -4.08 | 141.12 | 830 | 596 |
| Isuai | city | Milne Bay | Papua New Guinea | -10.65 | 150.17 | 114 | 1175 |
| Isudau | city | Milne Bay | Papua New Guinea | -10.62 | 150.02 | 0 | 516 |
| Isuisu | city | Milne Bay | Papua New Guinea | -10.63 | 150.04 | 0 | 666 |
| Isumdimaiu | city | Milne Bay | Papua New Guinea | -10.00 | 150.95 | 0 | 964 |
| Isung | city | Madang | Papua New Guinea | -4.45 | 144.82 | 291 | 1341 |
| Isurava | city | Northern | Papua New Guinea | -8.98 | 147.72 | 5416 | 596 |
| Isurawa | city | Northern | Papua New Guinea | -8.98 | 147.72 | 5416 | 596 |