- Jamestown, Tuolumne County, California22
- Jammu and Kashmir, India113
- Jammu, Jammu and Kashmir, India1
- Janesville, Lassen County, California91
- Janiculum, Rome1
- Janina, Epirus, Greece2
- Janitzio, Michoacán, Mexico3
- Janom Point, Guam, Mariana Islands1
- Janos Municipality, Chihuahua, Mexico202
- Janos, Janos Municipality, Chihuahua15
- Japan5,807
- Japande, Middle Sepik river, East Sepik Province1
- Japanese Pavilion, Panama-Pacific International Exposition, San Francisco.1
- Japanese archipelago, Japan1,174
- Jatumpata, Pariahuanca district, Peru22
- Java, Indonesia251
- Javitas Ranch, Southwestern United States1
- Jawajei, Liberia1
- Jayapura, Papua Province, Indonesia2
- Jazvenik, Bugojno, Federation of Bosnia and Herzegovina2