Place
- Hawthorn Woods, Illinois3
- Hazel Crest, Illinois3
- Highland Park, Illinois3
- Highwood, Illinois3
- Hinsdale, Illinois3
- Homer Glen, Illinois3
- Homewood, Illinois3
- Hong Kong3
- Indian Creek, Illinois3
- Indian Ocean3
- Ingalls Park, Illinois3
- Inverness, Illinois3
- Island Lake, Illinois3
- Itasca, Illinois3
- Izúcar de Matamoros (Mexico)3
- Jamaica3
- Kenilworth, Illinois3
- Kildeer, Illinois3
- Knollwood, Illinois3
- Korea3