| Name | Babies | Alberta Rank |
|---|---|---|
| Oliver | 212 | 2 |
| Owen | 157 | 13 |
| Omar | 38 | 125 |
| Oscar | 37 | 131 |
| Orion | 21 | 230 |
| Odin | 18 | 257 |
| Oakley | 8 | 486 |
| Oskar | 7 | 526 |
| Oakland | 6 | 590 |
| Oaklen | 6 | 590 |
| Name | Babies | British Columbia Rank |
|---|---|---|
| Oliver | 217 | 1 |
| Owen | 163 | 13 |
| Oscar | 38 | 122 |
| Odin | 27 | 169 |
| Omar | 14 | 289 |
| Orion | 11 | 345 |
| Oakley | 10 | 376 |
| Otto | 7 | 500 |
| Olivier | 5 | 670 |
| Oskar | 5 | 671 |
| Name | Babies | England and Wales Rank |
|---|---|---|
| Oliver | 6,623 | 1 |
| Oscar | 3,894 | 10 |
| Ollie | 923 | 69 |
| Owen | 586 | 113 |
| Oakley | 445 | 134 |
| Olly | 294 | 191 |
| Omar | 275 | 203 |
| Oskar | 266 | 212 |
| Otis | 245 | 229 |
| Otto | 177 | 286 |
| Name | Babies | Northern Ireland Rank |
|---|---|---|
| Oliver | 207 | 3 |
| Oisin | 113 | 15 |
| Ollie | 108 | 19 |
| Oscar | 81 | 30 |
| Odhran | 69 | 42 |
| Owen | 17 | 160 |
| Olly | 16 | 163 |
| Oran | 10 | 214 |
| Odin | 7 | 272 |
| Oskar | 6 | 313 |
| Name | Babies | Ontario Rank |
|---|---|---|
| Owen | 543 | 13 |
| Oliver | 408 | 21 |
| Omar | 97 | 136 |
| Oscar | 82 | 157 |
| Olivier | 43 | 256 |
| Odin | 30 | 348 |
| Orion | 16 | 581 |
| Orlando | 13 | 683 |
| Oakley | 11 | 784 |
| Om | 11 | 785 |
| Name | Babies | Puerto Rico Rank |
|---|---|---|
| Owen | 28 | 92 |
| Omar | 12 | 197 |
| Oliver | 8 | 272 |
| Orlando | 8 | 273 |
| Oseias | 8 | 274 |
| Onix | 7 | 310 |
| Obed | 6 | 361 |
| Oscar | 5 | 423 |
| Name | Babies | Scotland Rank |
|---|---|---|
| Oliver | 393 | 3 |
| Oscar | 183 | 29 |
| Ollie | 153 | 38 |
| Owen | 97 | 74 |
| Olly | 46 | 133 |
| Oskar | 37 | 158 |
| Omar | 14 | 290 |
| Odin | 13 | 302 |
| Olivier | 13 | 302 |
| Oran | 11 | 331 |
| Name | Babies | South Australia Rank |
|---|---|---|
| Oliver | 190 | 1 |
| Oscar | 78 | 13 |
| Orlando | 22 | 87 |
| Owen | 21 | 95 |
| Ollie | 17 | 120 |
| Otis | 10 | 174 |
| Odin | 9 | 188 |
| Oakley | 7 | 231 |
| Otto | 4 | 377 |
| Olly | 3 | 489 |
| Name | Babies | USA Rank |
|---|---|---|
| Oliver | 13,141 | 9 |
| Owen | 9,312 | 28 |
| Oscar | 2,040 | 192 |
| Omar | 1,639 | 229 |
| Orion | 1,015 | 334 |
| Odin | 893 | 368 |
| Otto | 612 | 478 |
| Oakley | 610 | 479 |
| Omari | 565 | 512 |
| Orlando | 391 | 653 |
| Name | Babies | USA Territories Rank |
|---|---|---|
| Owen | 5 | 67 |