| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Yale | city | Illinois | United States | 39.11972 | -88.02472 | 544 | 691 |
| Yantisville | city | Illinois | United States | 39.53639 | -88.88333 | 708 | 1124 |
| Yates City | city | Illinois | United States | 40.77861 | -90.01472 | 662 | 1495 |
| Yatesville | city | Illinois | United States | 39.84583 | -90.06028 | 629 | 1012 |
| Yeager | city | Illinois | United States | 41.20778 | -87.70222 | 682 | 3262 |
| Yellow Banks | city | Illinois | United States | 40.73028 | -91.08111 | 518 | 3562 |
| Yellow Creek | city | Illinois | United States | 42.30556 | -89.85639 | 826 | 1227 |
| Yeomans | city | Illinois | United States | 39.65056 | -90.04083 | 688 | 1295 |
| Yeoward Addition | city | Illinois | United States | 41.75806 | -89.66056 | 649 | 19583 |
| Yoder Addition subdivision | city | Illinois | United States | 39.80583 | -88.27639 | 649 | 6953 |
| York | city | Illinois | United States | 39.17139 | -87.63917 | 439 | 795 |
| York Center | city | Illinois | United States | 41.85694 | -87.98778 | 721 | 155525 |
| Yorkfield | city | Illinois | United States | 41.86333 | -87.94833 | 659 | 158340 |
| Yorktown | city | Illinois | United States | 41.56972 | -89.85 | 633 | 796 |
| Yorkville | city | Illinois | United States | 41.64111 | -88.44722 | 639 | 6434 |
| Youngsdale | city | Illinois | United States | 41.99056 | -88.34056 | 807 | 28634 |
| Youngstown | city | Illinois | United States | 40.66056 | -90.61722 | 741 | 858 |
| Yuton | city | Illinois | United States | 40.53333 | -89.06028 | 797 | 14787 |
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