Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Taylor Springs | Populated Place | 191 | Montgomery | 39 07 51 N | 089 29 31 W |
| Taylor Springs School (historical) | School | 192 | Montgomery | 39 07 46 N | 089 29 30 W |
| Taylor-Martin Cemetery | Cemetery | 223 | Pike | 39 36 01 N | 090 57 52 W |
| Taylors Addition to South Chicago (subdivision) | Populated Place | 180 | Cook | 41 43 01 N | 087 32 04 W |
| Taylorville | Populated Place | 191 | Christian | 39 32 56 N | 089 17 40 W |
| Taylorville Chautaugua Auditorium | Building | 191 | Christian | 39 32 23 N | 089 17 45 W |
| Taylorville Christian Church | Church | 187 | Christian | 39 33 42 N | 089 17 44 W |
| Taylorville City Hall | Building | 190 | Christian | 39 33 00 N | 089 17 43 W |
| Taylorville Courthouse Square Historic District | Park | 192 | Christian | 39 32 56 N | 089 17 44 W |
| Taylorville High School | School | 186 | Christian | 39 33 47 N | 089 18 12 W |
| Taylorville Junior High School | School | 187 | Christian | 39 33 27 N | 089 17 38 W |
| Taylorville Lake | Reservoir | 180 | Christian | 39 31 48 N | 089 15 18 W |
| Taylorville Municipal Airport | Airport | 187 | Christian | 39 32 02 N | 089 19 39 W |
| Taylorville Post Office | Post Office | 191 | Christian | 39 32 49 N | 089 17 40 W |
| Taylorville Public Library | Building | 190 | Christian | 39 33 02 N | 089 17 45 W |
| Taylorville Southern Baptist Church | Church | 187 | Christian | 39 33 39 N | 089 17 53 W |
| Tazewell | Populated Place | 201 | Tazewell | 40 29 04 N | 089 19 57 W |
| Tazewell County | Civil | 207 | Tazewell | 40 32 00 N | 089 33 00 W |
| Tazewell County Courthouse | Building | 146 | Tazewell | 40 34 09 N | 089 38 52 W |
| Tazewell County Farm Cemetery | Cemetery | 192 | Tazewell | 40 32 34 N | 089 30 44 W |
| Tazewell County Home | Building | 202 | Tazewell | 40 32 24 N | 089 31 06 W |
| Tazewell County Jail | Building | 146 | Tazewell | 40 34 08 N | 089 38 51 W |
| Tazewell County Sheriff Office | Building | 145 | Tazewell | 40 34 08 N | 089 38 57 W |
| Tazewell School (historical) | School | 274 | Kane | 42 04 55 N | 088 23 02 W |
| Teal Island | Island | 145 | Adams | 39 59 48 N | 091 27 42 W |
| Teal Lake | Reservoir | 142 | Williamson | 37 39 12 N | 088 57 54 W |
| Teal Lake Dam | Dam | 142 | Williamson | 37 39 12 N | 088 57 54 W |
| Teal Pond | Reservoir | 202 | Pope | 37 32 31 N | 088 38 30 W |
| Teal Pond Campground | Locale | 195 | Pope | 37 32 28 N | 088 38 34 W |
| Tealls Corners School (historical) | School | 229 | Ogle | 41 54 38 N | 089 20 28 W |
| Teasons Woods | Woods | 198 | Cook | 41 40 55 N | 087 52 24 W |
| Tebo Burial Ground | Cemetery | 180 | Brown | 40 00 37 N | 090 40 37 W |
| Tebrugge Mine | Mine | 170 | Menard | 40 00 38 N | 089 57 40 W |
| Technological Institute | School | 183 | Cook | 42 03 29 N | 087 40 33 W |
| Technology Center of DuPage | School | 225 | DuPage | 41 55 31 N | 088 02 24 W |
| Techny (historical) | Populated Place | 196 | Cook | 42 06 58 N | 087 49 20 W |
| Techny Reservoir | Reservoir | 175 | Cook | 42 06 24 N | 087 41 36 W |
| Techny Reservoir Dam | Dam | 175 | Cook | 42 06 24 N | 087 41 36 W |
| Tecumseh Park | Park | 186 | Cook | 42 01 26 N | 087 44 54 W |
| Ted Liss Studio | School | 182 | Cook | 41 54 37 N | 087 38 04 W |
| Ted Stone Woods | Woods | 188 | Cook | 41 46 18 N | 087 51 48 W |
| Teddy Bear Pre-School | School | 182 | Cook | 41 48 03 N | 087 41 28 W |
| Teddy Bear Pre-School Number 3 | School | 185 | Cook | 41 46 36 N | 087 43 20 W |
| Tedens (historical) | Populated Place | 181 | DuPage | 41 41 40 N | 087 58 22 W |
| Teds Place Airport | Airport | 241 | Ford | 40 25 32 N | 088 00 02 W |
| Teege Cemetery | Cemetery | 195 | Iroquois | 40 55 42 N | 087 46 12 W |
| Tefft Middle School | School | 250 | Cook | 42 00 33 N | 088 09 53 W |
| Tehan School (historical) | School | 186 | Whiteside | 41 54 17 N | 090 07 02 W |
| Teheran | Populated Place | 165 | Mason | 40 13 28 N | 089 47 56 W |
| Tekakwitha County Forest Preserve | Park | 227 | Kane | 41 58 00 N | 088 18 08 W |
| Telefurerza Diaria Church | Church | 183 | Cook | 41 54 31 N | 087 42 41 W |
| Telford School (historical) | School | 211 | Livingston | 40 58 45 N | 088 22 35 W |
| Telford School (historical) | School | 172 | Marion | 38 31 14 N | 088 54 12 W |
| Telshe Yeshiva Chicago Branch | School | 181 | Cook | 41 58 31 N | 087 43 03 W |
| Temmes Pond | Lake | 122 | Washington | 38 27 49 N | 089 36 59 W |
| Temperance Hill Cemetery | Cemetery | 264 | Lee | 41 46 17 N | 089 20 19 W |
| Temperance Hill Cemetery Prairie Nature Preserve | Park | 264 | Lee | 41 46 17 N | 089 20 16 W |
| Temperance Hill School (historical) | School | 264 | Lee | 41 46 20 N | 089 20 13 W |
| Temperance School (historical) | School | 199 | Hancock | 40 17 54 N | 091 13 10 W |
| Templars Hall (historical) | Building | 189 | Fulton | 40 34 07 N | 090 22 04 W |
| Temple Academy | School | 178 | Rock Island | 41 30 31 N | 090 30 15 W |
| Temple Anshe Sholom | Church | 212 | Cook | 41 30 39 N | 087 40 32 W |
| Temple B'nai Moshe | Church | 171 | La Salle | 41 19 55 N | 089 05 49 W |
| Temple B'nai Sholom | Church | 189 | Adams | 39 56 12 N | 091 24 07 W |
| Temple Baptist Church | Church | 218 | Cook | 41 28 46 N | 087 38 43 W |
| Temple Baptist Church | Church | 206 | Fulton | 40 34 25 N | 090 02 12 W |
| Temple Baptist Church | Church | 154 | Marion | 38 31 03 N | 089 07 50 W |
| Temple Baptist Church | Church | 234 | Winnebago | 42 15 58 N | 089 02 46 W |
| Temple Beth El | Church | 211 | Cook | 42 08 19 N | 087 52 06 W |
| Temple Beth Israel | Church | 183 | Cook | 42 02 26 N | 087 43 06 W |
| Temple Beth Israel School (historical) | School | 183 | Cook | 42 01 08 N | 087 43 41 W |
| Temple Beth-El | Church | 182 | Cook | 42 00 44 N | 087 42 23 W |
| Temple Bnai Abraham Zion | Church | 191 | Cook | 41 54 11 N | 087 48 19 W |
| Temple Bnai Israel | Church | 187 | Kankakee | 41 06 48 N | 087 51 37 W |
| Temple Cemetery | Cemetery | 193 | Fulton | 40 24 59 N | 090 23 33 W |
| Temple Hill | Populated Place | 157 | Pope | 37 18 26 N | 088 37 49 W |
| Temple Hill Post Office | Post Office | 162 | Pope | 37 18 24 N | 088 37 52 W |
| Temple Hoyne-Buell Hall | Building | 229 | Champaign | 40 06 09 N | 088 13 42 W |
| Temple Judea Mizpah | Church | 190 | Cook | 42 02 15 N | 087 45 01 W |
| Temple Menorah | Church | 183 | Cook | 42 00 55 N | 087 41 59 W |
| Temple Missionary Baptist Church | Church | 176 | Rock Island | 41 28 05 N | 090 28 14 W |
| Temple of Blessing Church of God in Christ | Church | 236 | Winnebago | 42 15 44 N | 089 07 00 W |
| Temple of Brotherly Love Community Church | Church | 181 | Cook | 41 45 17 N | 087 34 45 W |
| Temple of Christ | Church | 181 | Cook | 41 51 54 N | 087 42 28 W |
| Temple of Congregation Am Echod | Church | 194 | Lake | 42 21 53 N | 087 49 49 W |
| Temple of Deliverance | Church | 184 | Cook | 41 52 54 N | 087 43 35 W |
| Temple of Divine Service | Church | 180 | Cook | 41 46 51 N | 087 35 35 W |
| Temple of God Pentecostal Church | Church | 182 | Cook | 41 45 52 N | 087 36 15 W |
| Temple of Grace Church of God | Church | 228 | Will | 41 25 21 N | 087 37 50 W |
| Temple of Spiritual Truth | Church | 182 | Cook | 41 47 01 N | 087 39 17 W |
| Temple of Spiritual Truth | Church | 186 | Cook | 41 53 40 N | 087 45 13 W |
| Temple School (historical) | School | 155 | Washington | 38 14 41 N | 089 34 15 W |
| Temple Sholom | Church | 180 | Cook | 41 56 46 N | 087 38 34 W |
| Temple Sholom | Church | 235 | Knox | 40 57 05 N | 090 22 53 W |
| Temple Solomon | Church | 152 | Marion | 38 31 33 N | 089 07 38 W |
| Temples Pond | Reservoir | 184 | Coles | 39 36 54 N | 088 01 42 W |
| Temples Pond Dam | Dam | 184 | Coles | 39 36 54 N | 088 01 42 W |
| Templeton Cemetery | Cemetery | 214 | Shelby | 39 25 23 N | 088 32 31 W |
| Templo Calvario Iglesia | Church | 229 | Kane | 42 02 15 N | 088 16 47 W |
| Templo Christiano | Church | 180 | Bureau | 41 19 54 N | 089 11 59 W |
| Templo Voces Espiritules | Church | 184 | Cook | 41 54 14 N | 087 43 12 W |
| Tempo Park | Park | 247 | DuPage | 41 58 44 N | 088 08 55 W |
| Ten Mile Grove | Woods | 228 | Ford | 40 27 17 N | 088 09 15 W |
| Ten Mile Grove Cemetery | Cemetery | 226 | Ford | 40 27 07 N | 088 09 12 W |
| Ten Post Oak Baptist Church | Church | 150 | Wayne | 38 25 15 N | 088 39 02 W |
| Ten Post Oak Cemetery | Cemetery | 150 | Wayne | 38 25 16 N | 088 39 00 W |
| Teneriffe School (historical) | School | 135 | Jersey | 39 04 16 N | 090 33 24 W |
| Teneriffe School (historical) | School | 225 | Pike | 39 44 14 N | 090 49 06 W |
| Tenmile Church | Church | 132 | Hamilton | 38 04 40 N | 088 35 44 W |
| Tenmile Creek | Stream | | De Witt | 40 06 59 N | 089 03 42 W |