J
| Jabalpur (IN) | Jeh (MH) | Joensuu (FI) |
| Jackson (US) | Jerez de la Frontera (ES) | Johannesburg (ZA) |
| Jackson (US) | Jersey (GB) | Johnson City (US) |
| Jacksonville (US) | Jessore (BD) | Johor Bahru (MY) |
| Jacksonville (US) | Ji Parana (BR) | Joinville (BR) |
| Jaipur (IN) | Jiamusi (CN) | Jolo (PH) |
| Jaisalmer (IN) | Jiayuguan (CN) | Jonkoping (SE) |
| Jakarta (ID) | Jijel (DZ) | Joplin (US) |
| Jalapa Enriquez (MX) | Jijiga (ET) | Jorhat (IN) |
| Jambi (ID) | Jima (ET) | Jos (NG) |
| Jamestown (US) | Jinan (CN) | Jowz (CN) |
| Jamestown (US) | Jin'an (CN) | Juazeiro do Norte (BR) |
| Jammu (IN) | Jingdezhen (CN) | Juba (SD) |
| Jamnagar (IN) | Jinjiang (CN) | Juiz de Fora (BR) |
| Jamshedpur (IN) | Jinzhou (CN) | Julia Creek (AU) |
| Jayapura (ID) | Jiujiang (CN) | Juliaca (PE) |
| Jazireh-ye Kish (IR) | Jizan (SA) | Juneau (US) |
| Jazireh-ye Qeshm (IR) | João Pessoa (BR) | Jyvaskyla (FI) |
| Jefferson County (US) | Jodhpur (IN) |