Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Fernway | Populated Place | 218 | Cook | 41 34 12 N | 087 49 24 W |
| Fernway Park | Populated Place | 213 | Cook | 41 35 13 N | 087 49 48 W |
| Fernway Park Elementary School | School | 217 | Cook | 41 35 19 N | 087 50 03 W |
| Fernwood Elementary School | School | 183 | Cook | 41 42 39 N | 087 38 24 W |
| Fernwood Park | Park | 185 | Cook | 41 42 13 N | 087 38 21 W |
| Fernwood Parkway Park | Park | 183 | Cook | 41 42 43 N | 087 37 58 W |
| Fernwood United Methodist Church | Church | 183 | Cook | 41 42 39 N | 087 38 16 W |
| Ferrel | Populated Place | 186 | Edgar | 39 29 46 N | 087 35 06 W |
| Ferrell Cemetery | Cemetery | 156 | Crawford | 38 51 09 N | 087 34 38 W |
| Ferrell Church | Church | 143 | Williamson | 37 41 43 N | 088 47 45 W |
| Ferrell Field | Park | 189 | Cook | 41 42 36 N | 087 42 56 W |
| Ferrell Hospital | Hospital | 125 | Saline | 37 49 02 N | 088 26 20 W |
| Ferrin | Populated Place | 142 | Clinton | 38 36 34 N | 089 14 00 W |
| Ferrin School (historical) | School | 228 | Carroll | 42 03 13 N | 089 59 46 W |
| Ferris | Populated Place | 208 | Hancock | 40 28 08 N | 091 10 14 W |
| Ferris School | School | 208 | Hancock | 40 27 57 N | 091 10 12 W |
| Ferris School (historical) | School | 242 | Knox | 41 04 40 N | 090 11 39 W |
| Ferry Hall School | School | 201 | Lake | 42 14 56 N | 087 49 21 W |
| Ferry Lake | Lake | 131 | Scott | 39 37 50 N | 090 36 13 W |
| Ferry Lake Slough | Gut | 134 | Tazewell | 40 32 44 N | 089 47 17 W |
| Ferson Creek | Stream | | Kane | 41 55 41 N | 088 19 06 W |
| Ferson Creek County Forest Preserve | Park | 227 | Kane | 41 57 00 N | 088 21 25 W |
| Ferson Creek Fen Nature Preserve | Park | 212 | Kane | 41 55 56 N | 088 19 10 W |
| Ferson Creek Park | Park | 212 | Kane | 41 55 41 N | 088 19 25 W |
| Ferson Creek School | School | 230 | Kane | 41 57 22 N | 088 21 45 W |
| Ferson Creek Woods | Populated Place | 237 | Kane | 41 57 32 N | 088 21 53 W |
| Ferwood Cemetery | Cemetery | 198 | Greene | 39 28 29 N | 090 22 55 W |
| Festival Park | Park | 221 | Cook | 42 05 24 N | 087 59 13 W |
| Fetter Lake | Reservoir | 213 | Johnson | 37 31 06 N | 088 49 18 W |
| Fetter Lake Dam | Dam | 213 | Johnson | 37 31 06 N | 088 49 18 W |
| Fetzner Park | Park | 268 | McHenry | 42 12 10 N | 088 20 47 W |
| Fey School (historical) | School | 168 | Schuyler | 40 01 49 N | 090 35 11 W |
| Feyerabend Pond | Reservoir | 177 | Jersey | 39 06 00 N | 090 14 54 W |
| Feyerabend Pond Dam | Dam | 177 | Jersey | 39 06 00 N | 090 14 54 W |
| Fiatt | Populated Place | 205 | Fulton | 40 33 37 N | 090 10 47 W |
| Fiatt Cemetery | Cemetery | 196 | Fulton | 40 33 07 N | 090 12 53 W |
| Fiatt Post Office | Post Office | 206 | Fulton | 40 33 35 N | 090 10 50 W |
| Fiatt Scott School (historical) | School | 203 | Fulton | 40 33 38 N | 090 11 55 W |
| Ficht Cemetery | Cemetery | 229 | Tazewell | 40 43 50 N | 089 29 09 W |
| Ficklin | Populated Place | 207 | Douglas | 39 47 55 N | 088 21 19 W |
| Ficklin-Airtech Airport | Airport | 204 | Livingston | 40 46 00 N | 088 30 20 W |
| Fiddler Bridge | Bridge | 186 | Iroquois | 40 48 45 N | 087 48 26 W |
| Fiddyment Creek | Stream | | Will | 41 36 02 N | 088 03 29 W |
| Fidelity | Populated Place | 194 | Jersey | 39 09 10 N | 090 09 52 W |
| Fidelity School (historical) | School | 207 | Iroquois | 40 38 27 N | 087 37 31 W |
| Fiedler School (historical) | School | 224 | Champaign | 40 14 18 N | 088 12 44 W |
| Field Elementary School | School | 180 | Cook | 42 00 35 N | 087 40 10 W |
| Field Elementary School | School | 206 | DuPage | 41 54 20 N | 087 55 51 W |
| Field Elementary School | School | 177 | Jefferson | 38 25 59 N | 088 52 04 W |
| Field Elementary School | School | 151 | Marion | 38 30 56 N | 089 08 13 W |
| Field Park | Park | 192 | Cook | 41 54 09 N | 087 47 58 W |
| Field Park | Park | 194 | Cook | 41 59 56 N | 087 52 13 W |
| Field Park Elementary School | School | 202 | Cook | 41 48 41 N | 087 53 41 W |
| Field School | School | 182 | Cook | 41 37 20 N | 087 37 51 W |
| Field School (historical) | School | 239 | McLean | 40 20 45 N | 088 45 33 W |
| Fieldcrest Elementary School | School | 197 | Cook | 41 35 43 N | 087 43 14 W |
| Fieldcrest Elementary School-South | School | 227 | Woodford | 40 54 08 N | 089 02 18 W |
| Fieldcrest Elementary School-West | School | 211 | Marshall | 41 00 13 N | 089 08 18 W |
| Fieldcrest High School | School | 228 | Woodford | 40 54 06 N | 089 01 45 W |
| Fieldcrest Middle School-East | School | 213 | Marshall | 41 03 28 N | 089 03 06 W |
| Fieldcrest Middle School-West | School | 212 | Marshall | 41 00 16 N | 089 07 35 W |
| Fieldcrest Park | Park | 195 | Cook | 41 35 44 N | 087 43 44 W |
| Fieldon | Populated Place | 210 | Jersey | 39 06 31 N | 090 29 54 W |
| Fieldon Elementary | School | 216 | Jersey | 39 06 29 N | 090 30 10 W |
| Fieldon Hollow | Valley | | Jersey | 39 04 29 N | 090 29 30 W |
| Fields Cemetery | Cemetery | 146 | Marion | 38 31 59 N | 088 44 28 W |
| Fields Cemetery | Cemetery | 131 | Pope | 37 22 05 N | 088 35 09 W |
| Fields Church | Church | 132 | Gallatin | 37 44 38 N | 088 10 56 W |
| Fields of Saratoga (subdivision) | Populated Place | 167 | Grundy | 41 23 02 N | 088 26 23 W |
| Fifer School (historical) | School | 241 | McLean | 40 33 04 N | 089 14 22 W |
| Fifield Cemetery | Cemetery | 225 | Bureau | 41 20 12 N | 089 39 54 W |
| Fifteenth Church of Christ Scientist | Church | 189 | Cook | 41 53 42 N | 087 46 18 W |
| Fifteenth Street Baptist Church | Church | 127 | St. Clair | 38 37 53 N | 090 07 53 W |
| Fifteenth Street Church of God | Church | 153 | Marion | 38 30 33 N | 089 07 50 W |
| Fifth District Appellate Court | Building | 155 | Jefferson | 38 19 02 N | 088 54 30 W |
| Fifty Acres (subdivision) | Populated Place | 179 | Cook | 41 54 13 N | 087 38 54 W |
| Fifty-nineth Street Harbor | Locale | 175 | Cook | 41 47 15 N | 087 34 45 W |
| Fifty-Seventh Street Beach | Beach | 176 | Cook | 41 47 31 N | 087 34 46 W |
| Fiftyeighth Avenue Baptist Church | Church | 185 | Cook | 41 50 59 N | 087 46 09 W |
| Fiftyninth and Main Park | Park | 234 | DuPage | 41 46 42 N | 088 00 36 W |
| Fiftyninth Street Beach | Beach | 178 | Cook | 41 47 22 N | 087 34 41 W |
| Fiftyninth Street Interchange | Crossing | 183 | Cook | 41 36 04 N | 087 34 59 W |
| Fiftyninth Street Marina | Locale | 175 | Cook | 41 47 17 N | 087 34 46 W |
| Figley Branch | Stream | | Adams | 39 57 27 N | 091 04 09 W |
| Fike Cemetery | Cemetery | 140 | St. Clair | 38 30 35 N | 089 45 30 W |
| Fikes Hill | Summit | 176 | Marion | 38 32 08 N | 089 00 22 W |
| Filber Park | Park | 183 | Cook | 41 57 12 N | 087 40 32 W |
| File Cemetery | Cemetery | 169 | Bond | 38 52 26 N | 089 32 01 W |
| File Cemetery | Cemetery | 136 | Johnson | 37 24 41 N | 088 57 30 W |
| Fillmore | Populated Place | 193 | Montgomery | 39 06 55 N | 089 16 44 W |
| Fillmore (historical) | Populated Place | 198 | Douglas | 39 42 48 N | 088 22 52 W |
| Fillmore Baptist Church | Church | 195 | Montgomery | 39 07 02 N | 089 16 34 W |
| Fillmore Cemetery | Cemetery | 197 | Douglas | 39 43 03 N | 088 23 28 W |
| Fillmore Lake | Reservoir | 181 | Montgomery | 39 06 06 N | 089 15 10 W |
| Fillmore Lake Dam | Dam | 181 | Montgomery | 39 06 06 N | 089 15 12 W |
| Fillmore Post Office | Post Office | 193 | Montgomery | 39 06 54 N | 089 16 44 W |
| Fillmore School | School | 145 | Lawrence | 38 39 30 N | 087 42 47 W |
| Film Row (subdivision) | Populated Place | 182 | Cook | 41 51 50 N | 087 37 29 W |
| Filson | Populated Place | 196 | Douglas | 39 41 22 N | 088 13 55 W |
| Filson Park | Park | 211 | Cook | 41 35 31 N | 087 47 57 W |
| Filson Post Office (historical) | Post Office | 196 | Douglas | 39 41 19 N | 088 13 56 W |
| Filson School (historical) | School | 198 | Douglas | 39 40 51 N | 088 13 57 W |
| Finch Cemetery | Cemetery | 152 | Marion | 38 46 21 N | 089 04 19 W |
| Finch Lake | Lake | 136 | Mason | 40 04 29 N | 090 13 16 W |
| Finch School (historical) | School | 201 | Coles | 39 27 53 N | 088 11 12 W |
| Findlay | Populated Place | 207 | Shelby | 39 31 21 N | 088 45 13 W |
| Findlay Bridge | Bridge | 183 | Moultrie | 39 31 15 N | 088 42 07 W |
| Findlay Cemetery | Cemetery | 204 | Shelby | 39 31 21 N | 088 44 30 W |
| Findlay Elementary School | School | 207 | Shelby | 39 31 24 N | 088 45 13 W |
| Findlay High School | School | 205 | Shelby | 39 31 20 N | 088 45 37 W |