Zip Code | City | Population |
|---|---|---|
| 61820 | Champaign | 38,128 |
| 61821 | Champaign | 29,072 |
| 61801 | Urbana | 27,965 |
| 61822 | Champaign | 27,929 |
| 61802 | Urbana | 19,722 |
| 61853 | Mahomet | 14,288 |
| 61866 | Rantoul | 13,442 |
| 61874 | Savoy | 8,653 |
| 61873 | Saint Joseph | 5,811 |
| 61880 | Tolono | 4,570 |
| 61843 | Fisher | 2,138 |
| 61849 | Homer | 1,955 |
| 61864 | Philo | 1,754 |
| 61859 | Ogden | 1,244 |
| 61878 | Thomasboro | 1,217 |
| 61875 | Seymour | 1,196 |
| 61847 | Gifford | 1,194 |
| 61877 | Sidney | 1,185 |
| 61863 | Pesotum | 821 |
| 61862 | Penfield | 694 |
| 61872 | Sadorus | 543 |
| 61840 | Dewey | 530 |
| 60949 | Ludlow | 517 |
| 61816 | Broadlands | 442 |
| 61871 | Royal | 343 |
| 61815 | Bondville | 298 |
| 61851 | Ivesdale | 296 |
| 61845 | Foosland | 251 |
| 61852 | Longview | 138 |