| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Heapsville | city | Illinois | United States | 40.75972 | -91.07167 | 518 | 13209 |
| Heartville | city | Illinois | United States | 39.05056 | -88.54333 | 551 | 6989 |
| Heatherfield | city | Illinois | United States | 41.36667 | -88.46639 | 524 | 8065 |
| Heathsville | city | Illinois | United States | 38.89667 | -87.56778 | 452 | 1159 |
| Heaton | city | Illinois | United States | 40.41083 | -87.58944 | 705 | 1434 |
| Hebron | city | Illinois | United States | 42.47167 | -88.43222 | 925 | 4315 |
| Hecker | city | Illinois | United States | 38.305 | -89.99417 | 449 | 1942 |
| Hedgewood | city | Illinois | United States | 40.50694 | -88.93639 | 800 | 57694 |
| Hegeler | city | Illinois | United States | 41.3725 | -89.18222 | 639 | 11312 |
| Hegeler | city | Illinois | United States | 40.07556 | -87.635 | 649 | 15884 |
| Hegewisch | city | Illinois | United States | 41.65361 | -87.54694 | 583 | 151680 |
| Helena | city | Illinois | United States | 38.61417 | -87.86389 | 462 | 1139 |
| Helm | city | Illinois | United States | 38.51111 | -88.70861 | 498 | 1248 |
| Helmar | city | Illinois | United States | 41.545 | -88.48389 | 698 | 2582 |
| Heman | city | Illinois | United States | 39.94694 | -89.10556 | 613 | 1512 |
| Henderson | city | Illinois | United States | 41.025 | -90.35611 | 800 | 9696 |
| Henderson | city | Illinois | United States | 39.15583 | -89.79528 | 649 | 6004 |
| Henderson Grove | city | Illinois | United States | 41.01972 | -90.41139 | 748 | 9306 |
| Hendrix | city | Illinois | United States | 40.41944 | -88.97778 | 777 | 52025 |
| Henkel | city | Illinois | United States | 41.60028 | -89.17361 | 833 | 2578 |
| Hennepin | city | Illinois | United States | 41.25417 | -89.34222 | 508 | 1305 |
| Henning | city | Illinois | United States | 40.305 | -87.70083 | 688 | 948 |
| Henry | city | Illinois | United States | 41.11139 | -89.35639 | 439 | 3585 |
| Henton | city | Illinois | United States | 39.46361 | -88.90444 | 610 | 980 |
| Herald | city | Illinois | United States | 37.96639 | -88.18139 | 439 | 922 |
| Herbert | city | Illinois | United States | 42.15472 | -88.77611 | 862 | 2355 |
| Herborn | city | Illinois | United States | 39.3025 | -88.62889 | 636 | 997 |
| Hermon | city | Illinois | United States | 40.75694 | -90.31972 | 649 | 2282 |
| Hermosa subdivision | city | Illinois | United States | 41.92861 | -87.73444 | 606 | 722202 |
| Herod | city | Illinois | United States | 37.58028 | -88.43611 | 429 | 843 |
| Herrick | city | Illinois | United States | 39.22028 | -88.98444 | 590 | 1022 |
| Herrin | city | Illinois | United States | 37.80306 | -89.0275 | 439 | 16913 |
| Herrin Junction | city | Illinois | United States | 37.82417 | -89.01111 | 390 | 16913 |
| Herscher | city | Illinois | United States | 41.04917 | -88.09778 | 652 | 1951 |
| Hersman | city | Illinois | United States | 39.95 | -90.74111 | 679 | 2783 |
| Hervey City | city | Illinois | United States | 39.75556 | -88.85083 | 705 | 6912 |
| Hettick | city | Illinois | United States | 39.355 | -90.03694 | 551 | 764 |
| Hewittville | city | Illinois | United States | 39.53611 | -89.21667 | 626 | 3236 |
| Heyworth | city | Illinois | United States | 40.31333 | -88.97361 | 751 | 1717 |
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