Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Lemont Industrial Park Airport | Airport | 208 | Cook | 41 39 36 N | 088 01 35 W |
| Lena Flying Club Landing Field | Airport | 298 | Stephenson | 42 23 44 N | 089 51 23 W |
| Lentman Landing Strip | Airport | 185 | Livingston | 41 05 10 N | 088 50 03 W |
| Leonard W Hesselien Airport | Airport | 234 | Tazewell | 40 42 04 N | 089 25 44 W |
| Lewis University Airport | Airport | 203 | Will | 41 36 28 N | 088 05 20 W |
| Lincoln Land Community College Heliport | Airport | 178 | Sangamon | 39 43 23 N | 089 36 15 W |
| Lincoln-Minder Airport | Airport | 183 | Logan | 40 08 00 N | 089 19 30 W |
| Lincolnwood Town Center Heliport | Airport | 181 | Cook | 42 00 30 N | 087 42 55 W |
| Lindauer Airport | Airport | 125 | St. Clair | 38 18 38 N | 089 51 18 W |
| Lindauer Landing Strip | Airport | 128 | St. Clair | 38 18 14 N | 089 51 20 W |
| Lindbergh Air Mail Field (historical) | Airport | 181 | Sangamon | 39 49 33 N | 089 44 05 W |
| Lindell Loveless Airport | Airport | 198 | Macoupin | 39 10 56 N | 089 49 18 W |
| Lindstrom Heliport | Airport | 231 | Tazewell | 40 37 26 N | 089 22 23 W |
| Lisa Landing Strip | Airport | 190 | Bureau | 41 32 26 N | 089 46 34 W |
| Litchfield Municipal Airport | Airport | 209 | Montgomery | 39 09 58 N | 089 40 29 W |
| Litchfield RLA Airport | Airport | 214 | Champaign | 40 04 23 N | 088 23 58 W |
| Little Sister Seaplane Base | Airport | 134 | Putnam | 41 12 00 N | 089 21 00 W |
| Lloyd Airport | Airport | 202 | Macoupin | 39 26 52 N | 089 42 23 W |
| Logan County Airport | Airport | 180 | Logan | 40 09 31 N | 089 20 06 W |
| Lombard Airport (historical) | Airport | 225 | DuPage | 41 51 27 N | 088 01 47 W |
| Long RLA Airport | Airport | 209 | Warren | 40 39 51 N | 090 29 15 W |
| Longview Airport | Airport | 218 | La Salle | 41 23 16 N | 088 40 12 W |
| Love Field | Airport | 194 | Kankakee | 41 13 05 N | 087 32 25 W |
| Loy Airport | Airport | 201 | Iroquois | 40 55 55 N | 087 35 45 W |
| Loyola University Medical Center Heliport | Airport | 190 | Cook | 41 51 39 N | 087 50 11 W |
| Lund Airport | Airport | 228 | Winnebago | 42 18 42 N | 089 09 03 W |
| Lung RLA Airport | Airport | 187 | Hancock | 40 27 40 N | 091 04 26 W |
| Lunn Seaplane Base | Airport | 205 | Ogle | 42 06 25 N | 089 18 10 W |
| Lutheran General Hospital Heliport | Airport | 196 | Cook | 42 02 19 N | 087 50 50 W |
| Lutz Airport | Airport | 160 | Fayette | 38 55 02 N | 089 13 32 W |
| Lutz RLA Airport | Airport | 166 | Tazewell | 40 25 42 N | 089 36 07 W |
| Lytleville Orchard Airport | Airport | 239 | McLean | 40 20 04 N | 088 57 19 W |
| M and J Air Incorporated Airport | Airport | 207 | Mercer | 41 12 45 N | 090 54 23 W |
| M G T Channahon Illinois Heliport | Airport | 181 | Will | 41 26 56 N | 088 08 38 W |
| Mabry Landing Strip | Airport | 202 | Hancock | 40 18 30 N | 091 05 16 W |
| Machesney Airport (historical) | Airport | 224 | Winnebago | 42 21 00 N | 089 03 08 W |
| Macomb Municipal Airport | Airport | 210 | McDonough | 40 31 13 N | 090 39 08 W |
| Maddox Airport | Airport | 207 | Vermilion | 39 57 25 N | 087 52 16 W |
| Madison Avenue Venture Heliport | Airport | 216 | DuPage | 41 45 05 N | 087 55 59 W |
| Magic Carpet Airport | Airport | 274 | Henry | 42 10 17 N | 088 22 00 W |
| Malone Landing Strip | Airport | 219 | Knox | 40 48 45 N | 090 26 25 W |
| Manito Mitchell Airport | Airport | 152 | Tazewell | 40 29 21 N | 089 46 40 W |
| Maple Hurst Farms Airport | Airport | 252 | Ogle | 42 00 30 N | 089 02 55 W |
| Marcor Heliport | Airport | 177 | Cook | 41 53 46 N | 087 38 32 W |
| Margenthaler Airport | Airport | 218 | De Witt | 40 03 25 N | 088 56 22 W |
| Marriott Heliport | Airport | 220 | Cook | 42 01 59 N | 088 01 58 W |
| Marshall Browning Hospital Heliport | Airport | 138 | Perry | 38 01 32 N | 089 14 09 W |
| Marshall County Airport | Airport | 168 | Marshall | 41 01 09 N | 089 23 10 W |
| Martin Airport | Airport | 129 | Greene | 39 25 01 N | 090 35 09 W |
| Martin Airport | Airport | 168 | Logan | 40 10 50 N | 089 30 00 W |
| Martin RLA Airport | Airport | 219 | De Witt | 40 06 34 N | 088 49 43 W |
| Martins Airport | Airport | 210 | Hancock | 40 24 09 N | 091 09 55 W |
| Marvin D Bradd Airport | Airport | 241 | Piatt | 40 16 18 N | 088 29 40 W |
| Marx V Stott Airport | Airport | 268 | DeKalb | 41 58 56 N | 088 48 40 W |
| Mason Airport | Airport | 179 | Logan | 40 05 38 N | 089 21 46 W |
| Mason District Hospital Heliport | Airport | 141 | Mason | 40 18 28 N | 090 03 16 W |
| Mast Field | Airport | 227 | Adams | 39 58 36 N | 091 20 03 W |
| Mathews Landing Strip | Airport | 227 | McLean | 40 19 26 N | 088 45 06 W |
| Mathis Airport | Airport | 144 | Washington | 38 30 05 N | 089 12 00 W |
| Matsushita Electric Corp of America Heliport | Airport | 195 | Cook | 41 55 45 N | 087 51 43 W |
| Matteson RLA Airport | Airport | 170 | Grundy | 41 14 22 N | 088 20 47 W |
| Maulfair Airport | Airport | 215 | Putnam | 41 15 10 N | 089 16 20 W |
| Mayfield Landing Strip | Airport | 223 | Brown | 39 58 09 N | 090 53 02 W |
| Mayhall Airport | Airport | 195 | Douglas | 39 46 10 N | 088 05 43 W |
| Mays Aviation Airport | Airport | 226 | McLean | 40 42 00 N | 088 40 30 W |
| McAllister Landing Strip | Airport | 145 | Adams | 40 08 04 N | 091 27 60 W |
| McCartney Airport | Airport | 269 | Winnebago | 42 24 50 N | 089 19 45 W |
| McChristy Airport | Airport | 190 | Christian | 39 38 35 N | 089 08 40 W |
| McCoy Airport | Airport | 187 | Christian | 39 42 00 N | 089 12 32 W |
| McCulley Airport | Airport | 231 | Champaign | 40 13 13 N | 088 15 13 W |
| McCurdy Strip | Airport | 290 | Boone | 42 26 45 N | 088 54 00 W |
| McDonald Landing Strip | Airport | 200 | Sangamon | 39 31 35 N | 089 45 20 W |
| McDonalds Plaza Heliport | Airport | 204 | DuPage | 41 50 53 N | 087 56 40 W |
| McDonough County Hospital Heliport | Airport | 210 | McDonough | 40 27 00 N | 090 40 00 W |
| McHenry Farms Airport | Airport | 264 | Henry | 42 22 41 N | 088 19 24 W |
| McLeansboro Airport | Airport | 117 | Hamilton | 38 04 27 N | 088 32 15 W |
| McNaught Landing Strip | Airport | 194 | Sangamon | 39 34 35 N | 089 47 37 W |
| McNeals Field | Airport | 174 | Rock Island | 41 30 57 N | 090 22 46 W |
| McNeely Landing Strip | Airport | 204 | Montgomery | 39 13 40 N | 089 22 06 W |
| McPherson Airport | Airport | 191 | Hancock | 40 19 50 N | 091 03 00 W |
| Meadow Creek Airport | Airport | 238 | Will | 41 25 58 N | 087 46 54 W |
| Mealiff Landing Strip | Airport | 194 | Adams | 40 06 38 N | 091 12 11 W |
| Medical Center Heliport | Airport | 177 | Morgan | 39 44 49 N | 090 15 30 W |
| Meeker Airport | Airport | 147 | Hancock | 40 12 40 N | 091 29 24 W |
| Melody Field | Airport | 199 | Vermilion | 40 08 55 N | 087 41 40 W |
| Memorial Heliport | Airport | 264 | Stephenson | 42 17 40 N | 089 38 16 W |
| Memorial Hospital Heliport | Airport | 204 | Hancock | 40 24 33 N | 091 08 01 W |
| Memorial Hospital Heliport | Airport | 144 | Randolph | 37 55 25 N | 088 48 22 W |
| Memorial Hospital Heliport | Airport | 174 | St. Clair | 38 33 03 N | 090 01 18 W |
| Memorial Hospital of Carbondale Heliport | Airport | 135 | Jackson | 37 43 37 N | 089 13 16 W |
| Memorial Medical Center Heliport | Airport | 180 | Sangamon | 39 48 35 N | 089 39 18 W |
| Menard Correctional Center Heliport | Airport | 165 | Randolph | 37 55 22 N | 089 51 18 W |
| Mendota Community Hospital Heliport | Airport | 234 | La Salle | 41 33 07 N | 089 07 53 W |
| Mercer County Airport | Airport | 222 | Mercer | 41 14 55 N | 090 44 14 W |
| Mercer County Hospital Heliport | Airport | 220 | Mercer | 41 12 21 N | 090 45 36 W |
| Mercy Center for Health Care Services Heliport | Airport | 212 | Kane | 41 47 12 N | 088 19 26 W |
| Merkle Engineers Airport | Airport | 299 | Jo Daviess | 42 17 20 N | 090 20 43 W |
| Merrill C Meigs Airport (historical) | Airport | 178 | Cook | 41 51 31 N | 087 36 28 W |
| Methodist Medical Center of Illinois Heliport | Airport | 173 | Peoria | 40 42 02 N | 089 35 41 W |
| Metro-East Airport | Airport | 146 | Madison | 38 44 03 N | 089 48 28 W |
| Metropolis Municipal Airport | Airport | 116 | Massac | 37 11 09 N | 088 45 02 W |
| Metsker Landing Strip | Airport | 193 | Christian | 39 26 50 N | 089 13 00 W |
| Meyer Landing Strip | Airport | 173 | Henderson | 41 01 02 N | 090 52 30 W |
| Midway Landing Field (historical) | Airport | 196 | Edgar | 39 42 55 N | 087 41 05 W |
| Midwest Heliport | Airport | 215 | DuPage | 41 44 56 N | 087 56 06 W |
| Milford Airport | Airport | 200 | Iroquois | 40 38 09 N | 087 42 04 W |
| Mill Rose Farm RLA Airport | Airport | 260 | Cook | 42 04 38 N | 088 09 35 W |
| Miller Airport | Airport | 234 | Winnebago | 42 29 30 N | 089 05 45 W |
| Miller Landing Strip | Airport | 174 | Fayette | 39 01 24 N | 088 57 49 W |
| Miller/Maple Park Farm Airport | Airport | 262 | Kane | 41 53 55 N | 088 35 15 W |