| Jamar | | jə-MAHR | African American | |
| Jaquan | | - | African American (Modern) | |
| Jaylen | | JAY-lən (American), JAY-lin (English) | African American (Modern), English (Modern) | |
| Jaylin | | JAY-lin | African American (Modern), English (Modern) | |
| Jaylon | | JAY-lən | African American (Modern) | |
| Jesenia | | - | Spanish (Latin American) | |
| Jessenia | | - | Spanish (Latin American) | |
| Kalisha | | kə-LEESH-ə, kə-LISH-ə | African American (Rare) | |
| Kaneonuskatew | | - | Native American, Cree | |
| Kawacatoose | | - | Native American, Cree | |
| Keisha | | KEE-shə | African American | |
| Kenya | | KEN-yə | English, African American | |
| Keshaun | | - | African American (Modern) | |
| Keshawn | | - | African American (Modern) | |
| Keshia | | - | African American | |