| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Hadley | city | Illinois | United States | 41.57 | -87.94 | 830 | |
| Hadley | city | Illinois | United States | 39.71 | -90.97 | 830 | |
| Hadley | city | Illinois | United States | 38.72 | -87.91 | 830 | |
| Haegers Bend | city | Illinois | United States | 42.19 | -88.26 | 830 | |
| Hagaman | city | Illinois | United States | 39.31 | -90.08 | 830 | |
| Hagarstown | city | Illinois | United States | 38.94 | -89.17 | 830 | |
| Hagener | city | Illinois | United States | 39.93 | -90.40 | 830 | |
| Hahnaman | city | Illinois | United States | 41.63 | -89.64 | 830 | |
| Hainesville | city | Illinois | United States | 42.35 | -88.07 | 830 | |
| Haldane | city | Illinois | United States | 42.06 | -89.57 | 902 | |
| Hale Ridge (historical) | city | Illinois | United States | 40.18 | -90.65 | 830 | |
| Haley Meadows | city | Illinois | United States | 41.64 | -88.10 | 830 | |
| Half Day | city | Illinois | United States | 42.20 | -87.93 | 830 | |
| Hallidayboro | city | Illinois | United States | 37.89 | -89.24 | 400 | |
| Hallock | city | Illinois | United States | 40.56 | -87.60 | 830 | |
| Hallsville | city | Illinois | United States | 40.15 | -89.09 | 830 | |
| Halltown (historical) | city | Illinois | United States | 37.89 | -88.69 | 830 | |
| Halsey | city | Illinois | United States | 37.57 | -89.45 | 347 | |
| Hamburg | city | Illinois | United States | 38.87 | -89.27 | 830 | |
| Hamburg | city | Illinois | United States | 39.23 | -90.72 | 830 | |
| Hamburg Landing | city | Illinois | United States | 37.41 | -89.41 | 337 | |
| Hamel | city | Illinois | United States | 38.89 | -89.85 | 830 | |
| Hamilton | city | Illinois | United States | 40.40 | -91.34 | 830 | |
| Hamilton Corners | city | Illinois | United States | 41.71 | -89.97 | 830 | |
| Hamilton Estates | city | Illinois | United States | 42.18 | -88.10 | 856 | |
| Hamlet | city | Illinois | United States | 41.31 | -90.74 | 830 | |
| Hamletsburg | city | Illinois | United States | 37.14 | -88.43 | 298 | |
| Hamlin Park | city | Illinois | United States | 41.94 | -87.68 | 830 | |
| Hammond | city | Illinois | United States | 39.80 | -88.59 | 830 | |
| Hampshire | city | Illinois | United States | 42.10 | -88.53 | 908 | |
| Hampton | city | Illinois | United States | 41.56 | -90.41 | 830 | |
| Hampton Park | city | Illinois | United States | 41.65 | -88.09 | 830 | |
| Hanks Station | city | Illinois | United States | 39.46 | -90.47 | 830 | |
| Hanna City | city | Illinois | United States | 40.69 | -89.80 | 830 | |
| Hannon Mobile Home Park | city | Illinois | United States | 39.56 | -89.31 | 830 | |
| Hanover | city | Illinois | United States | 42.26 | -90.28 | 830 | |
| Hanover Park | city | Illinois | United States | 42.00 | -88.15 | 830 | |
| Hansen Subdivision | city | Illinois | United States | 42.12 | -87.85 | 830 | |
| Hanson | city | Illinois | United States | 39.22 | -89.11 | 830 | |
| Hanson Park | city | Illinois | United States | 41.92 | -87.77 | 830 | |
| Happy Hills | city | Illinois | United States | 41.92 | -88.38 | 830 | |
| Harbor Light Bay | city | Illinois | United States | 38.71 | -89.30 | 830 | |
| Harbor Square | city | Illinois | United States | 41.86 | -87.62 | 830 | |
| Harco | city | Illinois | United States | 37.80 | -88.65 | 413 | |
| Hardin | city | Illinois | United States | 39.16 | -90.62 | 830 | |
| Harding | city | Illinois | United States | 41.52 | -88.85 | 830 | |
| Hardinville | city | Illinois | United States | 38.92 | -87.84 | 830 | |
| Harlem | city | Illinois | United States | 42.34 | -89.02 | 830 | |
| Harmon | city | Illinois | United States | 41.72 | -89.55 | 830 | |
| Harmony | city | Illinois | United States | 42.16 | -88.53 | 892 | |
| Harmony | city | Illinois | United States | 38.41 | -88.79 | 830 | |
| Harness | city | Illinois | United States | 40.25 | -89.59 | 830 | |
| Harper | city | Illinois | United States | 42.14 | -89.65 | 944 | |
| Harper (historical) | city | Illinois | United States | 38.18 | -88.04 | 830 | |
| Harpster | city | Illinois | United States | 40.41 | -88.45 | 830 | |
| Harris | city | Illinois | United States | 39.68 | -87.71 | 830 | |
| Harris | city | Illinois | United States | 40.23 | -88.59 | 830 | |
| Harris Corners | city | Illinois | United States | 42.34 | -87.98 | 830 | |
| Harris Grove (historical) | city | Illinois | United States | 38.22 | -88.79 | 830 | |
| Harrisburg | city | Illinois | United States | 37.74 | -88.54 | 383 | |
| Harrison | city | Illinois | United States | 37.80 | -89.34 | 400 | |
| Harrison | city | Illinois | United States | 42.43 | -89.19 | 830 | |
| Harrison Avenue Gardens | city | Illinois | United States | 42.24 | -89.07 | 830 | |
| Harrisonville | city | Illinois | United States | 41.29 | -88.30 | 830 | |
| Harrisonville | city | Illinois | United States | 38.28 | -90.35 | 396 | |
| Harristown | city | Illinois | United States | 39.85 | -89.08 | 830 | |
| Harrisville | city | Illinois | United States | 42.16 | -89.03 | 830 | |
| Hartford | city | Illinois | United States | 37.80 | -88.67 | 830 | |
| Hartford | city | Illinois | United States | 38.83 | -90.10 | 830 | |
| Hartland | city | Illinois | United States | 42.36 | -88.51 | 935 | |
| Hartsburg | city | Illinois | United States | 40.25 | -89.44 | 830 | |
| Hartshorn | city | Illinois | United States | 40.13 | -87.71 | 830 | |
| Hartsville | city | Illinois | United States | 37.54 | -88.48 | 830 | |
| Harvard | city | Illinois | United States | 42.42 | -88.61 | 980 | |
| Harvard Hills | city | Illinois | United States | 40.73 | -89.48 | 830 | |
| Harvel | city | Illinois | United States | 39.36 | -89.53 | 830 | |
| Harvest Glen | city | Illinois | United States | 41.63 | -88.23 | 830 | |
| Harvey | city | Illinois | United States | 41.61 | -87.65 | 830 | |
| Harwood Heights | city | Illinois | United States | 41.97 | -87.81 | 830 | |
| Hastings | city | Illinois | United States | 41.68 | -87.97 | 830 | |
| Hastings | city | Illinois | United States | 39.91 | -87.89 | 830 | |
| Hastings | city | Illinois | United States | 41.97 | -88.40 | 839 | |
| Havana | city | Illinois | United States | 40.30 | -90.06 | 830 | |
| Hawkins Glen | city | Illinois | United States | 41.95 | -88.36 | 830 | |
| Hawley (historical) | city | Illinois | United States | 40.51 | -89.64 | 830 | |
| Hawthorn Knolls | city | Illinois | United States | 42.21 | -88.03 | 830 | |
| Hawthorn Woods | city | Illinois | United States | 42.22 | -88.05 | 830 | |
| Hawthorne Hills | city | Illinois | United States | 40.51 | -88.92 | 843 | |
| Hawthorne Place | city | Illinois | United States | 39.78 | -89.66 | 830 | |
| Hayes | city | Illinois | United States | 39.86 | -88.28 | 830 | |
| Haynes | city | Illinois | United States | 39.85 | -89.30 | 830 | |
| Hazel Crest | city | Illinois | United States | 41.57 | -87.69 | 830 | |
| Hazel Dell | city | Illinois | United States | 39.20 | -88.04 | 830 | |
| Hazel Green | city | Illinois | United States | 41.68 | -87.74 | 830 | |
| Hazelhurst | city | Illinois | United States | 41.96 | -89.69 | 856 |