Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Miles Station Cemetery | Cemetery | 204 | Macoupin | 39 04 19 N | 090 06 36 W |
| Miletus School (historical) | School | 162 | Marion | 38 45 06 N | 088 42 57 W |
| Milford | Populated Place | 204 | Iroquois | 40 37 42 N | 087 41 46 W |
| Milford Airport | Airport | 200 | Iroquois | 40 38 09 N | 087 42 04 W |
| Milford District Library | Building | 205 | Iroquois | 40 37 41 N | 087 41 36 W |
| Milford Grade School | School | 201 | Iroquois | 40 37 39 N | 087 42 05 W |
| Milford High School | School | 198 | Iroquois | 40 37 31 N | 087 41 56 W |
| Milhurst Lake | Reservoir | 192 | Kendall | 41 36 12 N | 088 34 36 W |
| Milhurst Lake Dam | Dam | 192 | Kendall | 41 36 12 N | 088 34 36 W |
| Military School (historical) | School | 252 | Knox | 41 00 04 N | 090 18 22 W |
| Milk Pail Village Shopping Center | Locale | 251 | Kane | 42 04 35 N | 088 15 37 W |
| Milk's Grove Cemetery | Cemetery | 220 | Iroquois | 40 57 44 N | 088 04 58 W |
| Milks Grove Church (historical) | Church | 203 | Iroquois | 40 57 22 N | 088 03 12 W |
| Milks Grove Town Hall | Building | 215 | Iroquois | 40 57 55 N | 088 05 02 W |
| Mill Bend | Bend | 105 | Jackson | 37 38 51 N | 089 25 35 W |
| Mill Creek | Populated Place | 116 | Union | 37 20 30 N | 089 15 09 W |
| Mill Creek | Stream | | Adams | 39 49 52 N | 091 24 20 W |
| Mill Creek | Stream | | Alexander | 37 13 39 N | 089 15 19 W |
| Mill Creek | Stream | | Clark | 39 10 11 N | 087 38 04 W |
| Mill Creek | Stream | | Clark | 39 27 54 N | 087 59 15 W |
| Mill Creek | Stream | | Cook | 41 41 05 N | 087 51 01 W |
| Mill Creek | Stream | | Jersey | 38 56 49 N | 090 17 46 W |
| Mill Creek | Stream | | Jo Daviess | 42 21 14 N | 090 11 19 W |
| Mill Creek | Stream | | Johnson | 37 23 03 N | 088 46 18 W |
| Mill Creek | Stream | | Kane | 41 49 17 N | 088 19 23 W |
| Mill Creek | Stream | | Lake | 42 25 03 N | 087 55 55 W |
| Mill Creek | Stream | | Madison | 38 39 37 N | 089 50 38 W |
| Mill Creek | Stream | | Ogle | 42 07 15 N | 089 16 44 W |
| Mill Creek | Stream | | Randolph | 37 54 23 N | 089 44 12 W |
| Mill Creek | Stream | | Rock Island | 41 28 17 N | 090 38 15 W |
| Mill Creek | Stream | | Rock Island | 41 27 21 N | 090 33 41 W |
| Mill Creek | Stream | | Schuyler | 40 06 46 N | 090 25 52 W |
| Mill Creek | Stream | | Union | 37 36 35 N | 089 15 28 W |
| Mill Creek | Stream | | Woodford | 40 40 10 N | 089 16 21 W |
| Mill Creek Cemetery | Cemetery | 166 | Randolph | 37 55 03 N | 089 41 19 W |
| Mill Creek County Forest Preserve | Park | 224 | Kane | 41 52 33 N | 088 22 00 W |
| Mill Creek County Park | Park | 195 | Clark | 39 26 15 N | 087 48 30 W |
| Mill Creek Election Precinct | Civil | 117 | Union | 37 21 09 N | 089 15 47 W |
| Mill Creek Impoundment Number 2 Reservoir | Reservoir | 174 | Clark | 39 23 18 N | 087 47 54 W |
| Mill Creek Park | Park | 210 | Cook | 42 07 53 N | 087 58 44 W |
| Mill Creek Quarry | Mine | 160 | Adams | 39 55 25 N | 091 16 47 W |
| Mill Creek School (historical) | School | 166 | Randolph | 37 55 03 N | 089 41 20 W |
| Mill Creek Structure Number 2 Dam | Dam | 174 | Clark | 39 23 18 N | 087 47 54 W |
| Mill Creek Structure Number 3 Dam | Dam | 159 | Clark | 39 23 12 N | 087 43 54 W |
| Mill Creek Watershed Impoundment Reservoir | Reservoir | 161 | Clark | 39 20 06 N | 087 45 06 W |
| Mill Creek Watershed Impoundment Reservoir | Reservoir | 155 | Clark | 39 19 18 N | 087 46 06 W |
| Mill Creek Watershed Impoundment Reservoir | Reservoir | 159 | Clark | 39 23 12 N | 087 43 54 W |
| Mill Creek Watershed Structure Number 1 Dam | Dam | 168 | Clark | 39 24 24 N | 087 47 42 W |
| Mill Creek Watershed Structure Number 6 Dam | Dam | 161 | Clark | 39 20 06 N | 087 45 06 W |
| Mill Creek Watershed Structure Number 7 Dam | Dam | 155 | Clark | 39 19 18 N | 087 46 06 W |
| Mill Ditch | Canal | 107 | Jackson | 37 42 09 N | 089 30 27 W |
| Mill Grove School (historical) | School | 179 | Logan | 40 07 23 N | 089 31 06 W |
| Mill Grove School (historical) | School | 258 | Stephenson | 42 15 07 N | 089 46 22 W |
| Mill Island | Island | 161 | Henderson | 40 57 53 N | 090 56 34 W |
| Mill Meadows Park | Park | 209 | DuPage | 41 55 35 N | 088 00 28 W |
| Mill Rose Farm RLA Airport | Airport | 260 | Cook | 42 04 38 N | 088 09 35 W |
| Mill School (historical) | School | 255 | Boone | 42 22 07 N | 088 43 30 W |
| Mill School (historical) | School | 219 | Ogle | 42 07 55 N | 089 18 05 W |
| Mill Shoals | Populated Place | 116 | White | 38 14 55 N | 088 20 48 W |
| Mill Shoals Oil Field | Oilfield | 109 | White | 38 14 16 N | 088 21 31 W |
| Mill Slough | Gut | 107 | Gallatin | 37 49 09 N | 088 05 54 W |
| Mill Slough | Gut | 107 | Gallatin | 37 50 31 N | 088 04 46 W |
| Mill Slough | Gut | 161 | Henderson | 40 57 35 N | 090 56 38 W |
| Mill Spring | Spring | 115 | Massac | 37 12 57 N | 088 33 47 W |
| Mill Springs Day Use Area | Park | 215 | Lee | 41 51 15 N | 089 20 59 W |
| Mill Street Elementary School | School | 217 | DuPage | 41 47 24 N | 088 09 12 W |
| Milla | Populated Place | 205 | La Salle | 41 08 29 N | 088 59 00 W |
| Millard Avenue Baptist Church | Church | 182 | Cook | 41 50 52 N | 087 42 56 W |
| Millard Congregational Church | Church | 183 | Cook | 41 50 58 N | 087 42 52 W |
| Millard Park | Park | 197 | Lake | 42 10 53 N | 087 46 56 W |
| Millbrig (historical) | Populated Place | 201 | Jo Daviess | 42 28 39 N | 090 24 16 W |
| Millbrig Hollow | Valley | | Jo Daviess | 42 28 34 N | 090 24 26 W |
| Millbrook | Populated Place | 191 | Kendall | 41 35 54 N | 088 33 10 W |
| Millbrook Junior High School | School | 188 | Kendall | 41 35 50 N | 088 33 17 W |
| Millbrook Post Office | Post Office | 188 | Kendall | 41 35 57 N | 088 33 14 W |
| Millbrook Shopping Center | Locale | 202 | Cook | 42 03 01 N | 087 49 58 W |
| Millburn | Populated Place | 226 | Lake | 42 25 33 N | 088 00 14 W |
| Millburn Cemetery | Cemetery | 213 | Lake | 42 25 25 N | 087 59 43 W |
| Millburn Community Consolidated School | School | 215 | Lake | 42 25 27 N | 087 59 39 W |
| Millburn Congregational Church | Church | 227 | Lake | 42 25 33 N | 088 00 16 W |
| Millburn School | School | 171 | St. Clair | 38 36 53 N | 089 57 25 W |
| Milledgeville | Populated Place | 232 | Carroll | 41 57 48 N | 089 46 28 W |
| Milledgeville Brethren Church | Church | 233 | Carroll | 41 57 52 N | 089 46 29 W |
| Milledgeville Elementary School | School | 237 | Carroll | 41 58 02 N | 089 46 19 W |
| Milledgeville Post Office | Post Office | 231 | Carroll | 41 57 45 N | 089 46 32 W |
| Millenium Park | Park | 177 | Cook | 41 52 58 N | 087 37 22 W |
| Millennium Elementary School | School | 215 | Cook | 41 33 59 N | 087 49 25 W |
| Millennium Park | Park | 246 | Kane | 42 00 48 N | 088 20 18 W |
| Miller | Populated Place | 165 | St. Clair | 38 32 06 N | 089 56 12 W |
| Miller Airport | Airport | 234 | Winnebago | 42 29 30 N | 089 05 45 W |
| Miller Branch | Stream | | Macoupin | 39 23 54 N | 090 03 50 W |
| Miller Cemetery | Cemetery | 115 | Alexander | 37 13 56 N | 089 25 27 W |
| Miller Cemetery | Cemetery | 197 | Alexander | 37 13 10 N | 089 21 55 W |
| Miller Cemetery | Cemetery | 137 | Alexander | 37 14 16 N | 089 20 45 W |
| Miller Cemetery | Cemetery | 182 | Bureau | 41 19 52 N | 089 13 21 W |
| Miller Cemetery | Cemetery | 210 | Coles | 39 32 08 N | 088 05 07 W |
| Miller Cemetery | Cemetery | 230 | DeKalb | 41 46 38 N | 088 40 02 W |
| Miller Cemetery | Cemetery | 203 | Douglas | 39 42 11 N | 088 24 50 W |
| Miller Cemetery | Cemetery | 128 | Franklin | 38 02 16 N | 088 50 09 W |
| Miller Cemetery | Cemetery | 146 | Jasper | 38 58 44 N | 087 58 23 W |
| Miller Cemetery | Cemetery | 127 | Johnson | 37 19 23 N | 088 57 36 W |
| Miller Cemetery | Cemetery | 198 | Logan | 40 18 48 N | 089 21 12 W |
| Miller Cemetery | Cemetery | 204 | Macoupin | 39 25 16 N | 090 04 37 W |
| Miller Cemetery | Cemetery | 221 | Mercer | 41 19 05 N | 090 58 57 W |
| Miller Cemetery | Cemetery | 154 | Pike | 39 31 04 N | 090 58 26 W |
| Miller Cemetery | Cemetery | 204 | Pike | 39 25 30 N | 090 37 49 W |
| Miller Cemetery | Cemetery | 203 | Vermilion | 40 22 03 N | 087 36 30 W |
| Miller Cemetery | Cemetery | 128 | Washington | 38 25 15 N | 089 37 48 W |
| Miller Cemetery | Cemetery | 113 | White | 38 01 01 N | 088 02 18 W |
| Miller Cemetery | Cemetery | 124 | White | 38 08 20 N | 088 11 19 W |