| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oei Tiong Ham Park | city | Singapore | 1.32 | 103.79 | 3 | 928853 | |
| Oei-ri | city | Jeonbuk | Korea, Republic of (South) | 35.36 | 127.19 | 403 | 7358 |
| Oeibifai | city | Nusa Tenggara Timur | Indonesia | -10.22 | 123.92 | 879 | 9507 |
| Oeido | city | Hwangnam | Korea, Dem. Peoples Rep. of (North) | 38.00 | 125.88 | 101 | 28145 |
| Oeienbraak | city | Noord-Brabant | Netherlands | 51.42 | 5.67 | 75 | 43390 |
| Oeijenbraak | city | Noord-Brabant | Netherlands | 51.42 | 5.67 | 75 | 43390 |
| Oeika | city | Nusa Tenggara Timur | Indonesia | -10.19 | 123.71 | 830 | 30413 |
| Oeika | city | Nusa Tenggara Timur | Indonesia | -9.69 | 124.47 | 1154 | 5561 |
| Oeikoeli | city | Sulawesi Tengah | Indonesia | -1.43 | 121.12 | 830 | 2378 |
| Oeilima | city | Maluku | Indonesia | -3.83 | 127.18 | 367 | 0 |
| Oeillyang | city | Gyeongbuk | Korea, Republic of (South) | 35.70 | 128.28 | 131 | 8493 |
| Oeina | city | Nusa Tenggara Timur | Indonesia | -10.01 | 123.75 | 305 | 8332 |
| Oeinek | city | Nusa Tenggara Timur | Indonesia | -10.86 | 122.90 | 403 | 12634 |
| Oeinu | city | Nusa Tenggara Timur | Indonesia | -9.93 | 124.37 | 1669 | 14311 |
| Oeip | city | Jeonnam | Korea, Republic of (South) | 34.55 | 126.41 | 3 | 4322 |
| Oeipsok | city | Gangwon | Korea, Republic of (South) | 37.61 | 128.47 | 2080 | 1043 |
| Oeiras | city | Kwanza Norte | Angola | -9.46 | 14.41 | 830 | 2533 |
| Oeiras | city | Piaui | Brazil | -7.02 | -42.13 | 830 | 22105 |
| Oeiras | city | Lisboa | Portugal | 38.69 | -9.31 | 32 | 146029 |
| Oeiras Airport | airport | -7.02 | -42.17 | 820 | 0 | ||
| Oeiras do Pará | city | Para | Brazil | -1.97 | -49.85 | 3 | 11037 |
| Oeiryang | city | Chungnam | Korea, Republic of (South) | 36.09 | 127.36 | 1020 | 9011 |