This is a list of the most common boy names starting with the letter K, based on babies born in the United States in the year 2021.
| Name | Births |
|---|---|
| Kai | 4,599 |
| Kayden | 3,555 |
| Kingston | 3,366 |
| Kaiden | 2,362 |
| Kevin | 2,094 |
| King | 2,028 |
| Karter | 1,903 |
| Knox | 1,718 |
| Kyrie | 1,715 |
| Kash | 1,471 |
| Kyler | 1,458 |
| Kaleb | 1,440 |
| Kenneth | 1,365 |
| Kaden | 1,321 |
| Kairo | 1,307 |
| Kayson | 1,212 |
| Khalil | 1,133 |
| Kobe | 1,106 |
| Karson | 1,086 |
| Kane | 993 |
| Kameron | 946 |
| Killian | 931 |
| Kyle | 886 |
| Kade | 846 |
| Kamari | 806 |
| Kason | 722 |
| Kendrick | 718 |
| Kashton | 708 |
| Kian | 666 |
| Kaison | 638 |
| Kyson | 633 |
| Kasen | 627 |
| Kamden | 626 |
| Kieran | 598 |
| Keegan | 592 |
| Kolton | 570 |
| Koda | 559 |
| Kylo | 555 |
| Kenzo | 551 |
| Keanu | 549 |
| Koa | 527 |
| Kylan | 484 |
| Kaysen | 478 |
| Kohen | 470 |
| Kannon | 465 |
| Keith | 464 |
| Kyree | 437 |
| Krew | 437 |
| Kareem | 380 |
| Kingsley | 370 |
| Keaton | 346 |
| Kiaan | 335 |
| Kyro | 332 |
| Khari | 326 |
| Kylian | 315 |
| Kaiser | 307 |
| Kase | 288 |
| Kabir | 283 |
| Kellan | 282 |
| Kenji | 278 |
| Korbin | 271 |
| Kole | 271 |
| Kellen | 269 |
| Kace | 264 |
| Khalid | 259 |
| Kye | 259 |
| Kyng | 253 |
| Kristian | 251 |
| Kelvin | 251 |
| Kylen | 241 |
| Kristopher | 240 |
| Karsyn | 234 |
| Kamdyn | 230 |
| Kartier | 229 |
| Kalel | 226 |
| Kody | 224 |
| Khai | 220 |
| Koen | 218 |
| Kacey | 217 |
| Kaisen | 213 |
| Kyzer | 212 |
| Kamryn | 211 |
| Keenan | 202 |
| Kayce | 197 |
| Kolten | 193 |
| Karim | 192 |
| Kolson | 191 |
| Kross | 191 |
| Kooper | 191 |
| Kyren | 188 |
| Kendall | 184 |
| Kolt | 182 |
| Kruz | 180 |
| Kaine | 178 |
| Kaius | 178 |
| Knowledge | 175 |
| Kaycen | 174 |
| Kilian | 166 |
| Korbyn | 166 |
| Kanan | 162 |