Place
- Hazel Crest, Illinois2
- Hickory Hills, Illinois2
- Highland Park, Illinois2
- Highwood, Illinois2
- Hillside, Illinois2
- Hinsdale, Illinois2
- Hodgkins, Illinois2
- Homer Glen, Illinois2
- Homewood, Illinois2
- Indian Creek, Illinois2
- Indian Head Park, Illinois2
- Ingalls Park, Illinois2
- Inverness, Illinois2
- Island Lake, Illinois2
- Itasca, Illinois2
- Jojutla de Juárez (Mexico)2
- Jordan2
- Justice, Illinois2
- Kenilworth, Illinois2
- Kildeer, Illinois2