| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Michael | city | Illinois | United States | 39.24 | -90.62 | 830 | |
| Michealsen Subdivision | city | Illinois | United States | 42.12 | -87.86 | 830 | |
| Michigan Beach | city | Illinois | United States | 41.51 | -88.06 | 830 | |
| Mid City (historical) | city | Illinois | United States | 39.22 | -90.39 | 830 | |
| Mid-North District | city | Illinois | United States | 41.92 | -87.64 | 830 | |
| Middle Creek | city | Illinois | United States | 40.37 | -91.03 | 830 | |
| Middlebury | city | Illinois | United States | 42.14 | -88.24 | 856 | |
| Middlecreek | city | Illinois | United States | 41.94 | -88.34 | 830 | |
| Middlegrove | city | Illinois | United States | 40.70 | -90.10 | 830 | |
| Middlepoint | city | Illinois | United States | 37.93 | -88.30 | 400 | |
| Middlesworth | city | Illinois | United States | 39.41 | -88.72 | 830 | |
| Middleton | city | Illinois | United States | 38.29 | -88.67 | 830 | |
| Middletown | city | Illinois | United States | 40.10 | -89.59 | 830 | |
| Midland City | city | Illinois | United States | 40.15 | -89.13 | 830 | |
| Midlothian | city | Illinois | United States | 41.63 | -87.72 | 830 | |
| Midway | city | Illinois | United States | 40.52 | -89.66 | 830 | |
| Midway | city | Illinois | United States | 40.02 | -87.64 | 830 | |
| Midway | city | Illinois | United States | 39.67 | -89.16 | 830 | |
| Midway | city | Illinois | United States | 37.24 | -88.63 | 830 | |
| Midway | city | Illinois | United States | 38.93 | -89.97 | 830 | |
| Midway (historical) | city | Illinois | United States | 40.70 | -90.24 | 830 | |
| Milan | city | Illinois | United States | 38.09 | -88.18 | 390 | |
| Milan | city | Illinois | United States | 41.45 | -90.57 | 830 | |
| Mildred | city | Illinois | United States | 39.76 | -89.63 | 830 | |
| Miles Station | city | Illinois | United States | 39.07 | -90.11 | 830 | |
| Milford | city | Illinois | United States | 40.63 | -87.70 | 830 | |
| Mill Creek | city | Illinois | United States | 37.34 | -89.25 | 377 | |
| Mill Race Creek | city | Illinois | United States | 41.70 | -88.32 | 830 | |
| Mill Shoals | city | Illinois | United States | 38.25 | -88.35 | 387 | |
| Milla | city | Illinois | United States | 41.14 | -88.98 | 830 | |
| Millbrig (historical) | city | Illinois | United States | 42.48 | -90.40 | 830 | |
| Millbrook | city | Illinois | United States | 41.60 | -88.55 | 830 | |
| Millburn | city | Illinois | United States | 42.43 | -88.00 | 830 | |
| Milledgeville | city | Illinois | United States | 41.96 | -89.77 | 830 | |
| Miller | city | Illinois | United States | 38.54 | -89.94 | 830 | |
| Miller City | city | Illinois | United States | 37.11 | -89.36 | 328 | |
| Millersburg | city | Illinois | United States | 41.24 | -90.82 | 830 | |
| Millersville | city | Illinois | United States | 39.45 | -89.16 | 830 | |
| Millhurst | city | Illinois | United States | 41.62 | -88.55 | 830 | |
| Millington | city | Illinois | United States | 41.56 | -88.60 | 830 | |
| Mills Prairie (historical) | city | Illinois | United States | 38.50 | -87.97 | 830 | |
| Millsdale | city | Illinois | United States | 41.44 | -88.16 | 830 | |
| Millstadt | city | Illinois | United States | 38.46 | -90.09 | 830 | |
| Millstadt Junction | city | Illinois | United States | 38.46 | -90.22 | 830 | |
| Millville | city | Illinois | United States | 39.06 | -89.94 | 830 | |
| Millville | city | Illinois | United States | 42.45 | -90.05 | 830 | |
| Milmine | city | Illinois | United States | 39.91 | -88.65 | 830 | |
| Milne | city | Illinois | United States | 39.26 | -88.79 | 830 | |
| Milo | city | Illinois | United States | 41.19 | -89.58 | 856 | |
| Milroy | city | Illinois | United States | 41.02 | -90.92 | 830 | |
| Milton | city | Illinois | United States | 39.56 | -90.65 | 830 | |
| Milton | city | Illinois | United States | 38.90 | -90.14 | 830 | |
| Mindale | city | Illinois | United States | 40.14 | -90.84 | 830 | |
| Mindale | city | Illinois | United States | 40.43 | -89.37 | 830 | |
| Mineral | city | Illinois | United States | 41.38 | -89.84 | 830 | |
| Mineral City (historical) | city | Illinois | United States | 37.41 | -88.35 | 324 | |
| Mineral Springs (historical) | city | Illinois | United States | 41.71 | -90.11 | 830 | |
| Minier | city | Illinois | United States | 40.43 | -89.31 | 830 | |
| Minonk | city | Illinois | United States | 40.90 | -89.03 | 830 | |
| Minooka | city | Illinois | United States | 41.46 | -88.26 | 830 | |
| Mira | city | Illinois | United States | 40.08 | -88.16 | 830 | |
| Mirage | city | Illinois | United States | 41.57 | -88.25 | 830 | |
| Missal | city | Illinois | United States | 41.10 | -88.74 | 830 | |
| Mission Hills Estates | city | Illinois | United States | 42.13 | -87.87 | 830 | |
| Missionfield | city | Illinois | United States | 40.10 | -87.75 | 830 | |
| Mitchell | city | Illinois | United States | 38.76 | -90.09 | 830 | |
| Mitchell | city | Illinois | United States | 37.92 | -89.05 | 413 | |
| Mitchells Subdivision | city | Illinois | United States | 41.74 | -87.71 | 830 | |
| Mitchellsville | city | Illinois | United States | 37.65 | -88.54 | 387 | |
| Mitchie | city | Illinois | United States | 38.21 | -90.33 | 387 |