Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| East Branch Green Creek | Stream | | Effingham | 39 11 30 N | 088 32 09 W |
| East Branch Horse Creek | Stream | | Kankakee | 41 09 49 N | 088 07 53 W |
| East Branch Hurricane Creek | Stream | | Coles | 39 22 46 N | 088 03 59 W |
| East Branch Illinois River | Gut | 134 | Mason | 40 11 30 N | 090 09 14 W |
| East Branch Kilbuck Creek | Stream | | DeKalb | 41 56 18 N | 088 56 06 W |
| East Branch Kiser Creek | Stream | | Pike | 39 39 40 N | 090 58 25 W |
| East Branch Lake Fork | Stream | | Montgomery | 39 04 58 N | 089 36 28 W |
| East Branch Lamarsh Creek | Stream | | Peoria | 40 35 08 N | 089 41 59 W |
| East Branch Little Silver Creek | Stream | | St. Clair | 38 36 46 N | 089 47 50 W |
| East Branch Panther Creek | Stream | | Woodford | 40 46 23 N | 089 04 33 W |
| East Branch Poplar Creek | Stream | | Cook | 42 03 07 N | 088 08 51 W |
| East Branch Reserve County Forest Preserve | Park | 217 | DuPage | 41 55 05 N | 088 02 45 W |
| East Branch Richland Creek | Stream | | Stephenson | 42 29 42 N | 089 38 42 W |
| East Branch South Branch Kishwaukee River | Stream | | DeKalb | 42 00 38 N | 088 43 25 W |
| East Branch Tower Creek | Stream | | Kankakee | 41 11 10 N | 087 41 50 W |
| East Brooklyn | Populated Place | 178 | Grundy | 41 10 24 N | 088 15 50 W |
| East Brooklyn Election Precinct | Civil | 113 | Massac | 37 09 25 N | 088 36 29 W |
| East Brushy School (historical) | School | 189 | Greene | 39 25 12 N | 090 30 04 W |
| East Buffalo Prairie School (historical) | School | 228 | Rock Island | 41 20 53 N | 090 48 40 W |
| East Bureau Creek | Stream | | Bureau | 41 18 13 N | 089 23 43 W |
| East C Streamline Lake | Lake | 146 | Perry | 38 03 15 N | 089 34 13 W |
| East Cambridge School (historical) | School | 236 | Henry | 41 17 41 N | 090 06 30 W |
| East Cape Election Precinct | Civil | 103 | Alexander | 37 17 06 N | 089 28 38 W |
| East Cape Girardeau | Populated Place | 104 | Alexander | 37 17 45 N | 089 29 46 W |
| East Cape Girardeau Airport | Airport | 101 | Alexander | 37 17 16 N | 089 27 05 W |
| East Cape Girardeau School | School | 103 | Alexander | 37 17 43 N | 089 29 56 W |
| East Carondelet | Populated Place | 125 | St. Clair | 38 32 31 N | 090 13 58 W |
| East Carondelet Elementary School | School | 124 | St. Clair | 38 32 26 N | 090 13 48 W |
| East Carondelet Post Office (historical) | Post Office | 125 | St. Clair | 38 32 31 N | 090 13 58 W |
| East Cemetery | Cemetery | 219 | Kane | 41 51 41 N | 088 18 21 W |