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| Hagaman | Heman | Hines |
| Hagarstown | Henderson | Hinsdale |
| Hamburg | Hennepin | Hinton |
| Hamel | Henning | Hodgkins |
| Hamilton | Henry | Hoffman |
| Hamletsburg | Henton | Hoffman Estates |
| Hammond | Herald | Holcomb |
| Hampshire | Herod | Holder |
| Hampton | Herrick | Homer |
| Hanna City | Herrin | Hometown |
| Hanover | Herscher | Homewood |
| Hanover Park | Hervey City | Hoopeston |
| Harco | Hettick | Hooppole |
| Hardin | Hewittsville | Hopedale |
| Harmon | Heyworth | Hopewell |
| Harrisburg | Hickory Hills | Hopkins Park |
| Harristown | Hidalgo | Hoyleton |
| Hartford | Highland | Hubly |
| Hartsburg | Highland Park | Hudson |
| Harvard | Highwood | Huey |
| Harvel | Hillsboro | Hull |
| Harvey | Hillsdale | Humboldt |
| Harwood Heights | Hillside (Cook) | Hume |
| Havana | Hillside | Huntley |
| Hazel Crest | Hillview | Huntsville |
| Hazel Dell | Hinckley | Hurst |
| Hebron | Hindsboro | Hutsonville |
| Hecker |