| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Wichert | city | Illinois | United States | 41.06 | -87.70 | 830 | |
| Wideview | city | Illinois | United States | 41.94 | -88.38 | 853 | |
| Wilber Heights | city | Illinois | United States | 40.14 | -88.24 | 830 | |
| Wilbern | city | Illinois | United States | 40.95 | -89.32 | 830 | |
| Wilberton | city | Illinois | United States | 38.88 | -88.95 | 830 | |
| Wilbur Heights | city | Illinois | United States | 40.14 | -88.24 | 830 | |
| Wilco Estates | city | Illinois | United States | 41.62 | -87.91 | 830 | |
| Wildebrook On The Green | city | Illinois | United States | 42.14 | -87.87 | 830 | |
| Wilderman | city | Illinois | United States | 38.47 | -89.94 | 830 | |
| Wildrose | city | Illinois | United States | 41.93 | -88.33 | 830 | |
| Wildrose Valley | city | Illinois | United States | 41.93 | -88.32 | 830 | |
| Wildwood | city | Illinois | United States | 42.34 | -88.00 | 830 | |
| Wildwood Valley | city | Illinois | United States | 42.06 | -88.37 | 895 | |
| Wilkinson | city | Illinois | United States | 42.01 | -88.78 | 879 | |
| Willard | city | Illinois | United States | 37.09 | -89.35 | 328 | |
| Willeford | city | Illinois | United States | 37.66 | -88.85 | 830 | |
| Willeys | city | Illinois | United States | 39.60 | -89.23 | 830 | |
| William Green Homes | city | Illinois | United States | 41.90 | -87.65 | 830 | |
| Williams Park | city | Illinois | United States | 42.25 | -88.18 | 830 | |
| Williams Trailer Court | city | Illinois | United States | 37.75 | -88.93 | 830 | |
| Williamsburg | city | Illinois | United States | 39.72 | -88.57 | 830 | |
| Williamsburg | city | Illinois | United States | 42.06 | -88.02 | 830 | |
| Williamsburg | city | Illinois | United States | 41.56 | -88.24 | 830 | |
| Williamsburg | city | Illinois | United States | 38.23 | -89.06 | 830 | |
| Williamsburg (historical) | city | Illinois | United States | 39.30 | -88.94 | 830 | |
| Williamsburg Green | city | Illinois | United States | 42.03 | -88.35 | 921 | |
| Williamsburg Hill | city | Illinois | United States | 39.30 | -88.93 | 830 | |
| Williamsburg Square | city | Illinois | United States | 42.15 | -87.81 | 830 | |
| Williamsfield | city | Illinois | United States | 40.92 | -90.01 | 830 | |
| Williamson | city | Illinois | United States | 38.99 | -89.76 | 830 | |
| Williamsville | city | Illinois | United States | 39.95 | -89.55 | 830 | |
| Willisville | city | Illinois | United States | 37.98 | -89.59 | 830 | |
| Willow | city | Illinois | United States | 42.28 | -89.95 | 875 | |
| Willow Cove | city | Illinois | United States | 42.11 | -87.84 | 830 | |
| Willow Creek | city | Illinois | United States | 42.11 | -87.85 | 830 | |
| Willow Creek | city | Illinois | United States | 41.84 | -88.47 | 830 | |
| Willow Creek Trailer Park | city | Illinois | United States | 40.47 | -89.02 | 830 | |
| Willow Grove | city | Illinois | United States | 41.70 | -88.11 | 830 | |
| Willow Hill | city | Illinois | United States | 39.00 | -88.02 | 830 | |
| Willow Ridge | city | Illinois | United States | 41.34 | -88.42 | 830 | |
| Willow Springs | city | Illinois | United States | 41.74 | -87.86 | 830 | |
| Willow Woods | city | Illinois | United States | 42.10 | -87.84 | 830 | |
| Willowbrook | city | Illinois | United States | 41.46 | -87.54 | 830 | |
| Willowbrook | city | Illinois | United States | 41.77 | -87.94 | 830 | |
| Willowbrook Acres | city | Illinois | United States | 42.12 | -87.79 | 830 | |
| Willows North | city | Illinois | United States | 42.10 | -87.85 | 830 | |
| Wilmette | city | Illinois | United States | 42.07 | -87.72 | 830 | |
| Wilmington | city | Illinois | United States | 41.31 | -88.15 | 830 | |
| Wilshire Terrace | city | Illinois | United States | 42.14 | -87.85 | 830 | |
| Wilsman | city | Illinois | United States | 41.17 | -88.93 | 830 | |
| Wilson | city | Illinois | United States | 42.37 | -88.14 | 830 | |
| Wilson | city | Illinois | United States | 42.35 | -87.91 | 830 | |
| Wilson Heights | city | Illinois | United States | 38.71 | -89.93 | 830 | |
| Wilsonburg (historical) | city | Illinois | United States | 38.76 | -88.24 | 830 | |
| Wilsonville | city | Illinois | United States | 39.07 | -89.86 | 830 | |
| Wilton | city | Illinois | United States | 41.38 | -87.93 | 830 | |
| Wilton Center | city | Illinois | United States | 41.35 | -87.96 | 830 | |
| Winchester | city | Illinois | United States | 39.63 | -90.46 | 830 | |
| Winchester Estates | city | Illinois | United States | 41.30 | -88.14 | 830 | |
| Winchester Place | city | Illinois | United States | 41.72 | -88.13 | 830 | |
| Winchester-Hood Garden Homes | city | Illinois | United States | 41.99 | -87.68 | 830 | |
| Windcrest | city | Illinois | United States | 41.70 | -88.33 | 830 | |
| Windenoak | city | Illinois | United States | 41.87 | -88.47 | 830 | |
| Windham | city | Illinois | United States | 42.11 | -87.85 | 830 | |
| Windham Manor | city | Illinois | United States | 42.11 | -87.85 | 830 | |
| Winding Creek | city | Illinois | United States | 41.58 | -88.17 | 830 | |
| Winding Waters Of Mill Race Creek | city | Illinois | United States | 41.70 | -88.32 | 830 | |
| Windmill Estates | city | Illinois | United States | 41.59 | -87.99 | 830 | |
| Windsor | city | Illinois | United States | 39.44 | -88.59 | 830 | |
| Windsor Park | city | Illinois | United States | 41.75 | -87.55 | 830 | |
| Wine Hill | city | Illinois | United States | 37.95 | -89.67 | 830 | |
| Winfield | city | Illinois | United States | 41.86 | -88.16 | 830 | |
| Wing | city | Illinois | United States | 40.82 | -88.40 | 830 | |
| Winkel | city | Illinois | United States | 40.35 | -89.63 | 830 | |
| Winkle | city | Illinois | United States | 38.15 | -89.49 | 830 | |
| Winnebago | city | Illinois | United States | 42.27 | -89.24 | 889 | |
| Winnebago Court | city | Illinois | United States | 42.21 | -89.08 | 830 | |
| Winneberger | city | Illinois | United States | 38.88 | -90.59 | 830 | |
| Winnemac | city | Illinois | United States | 41.97 | -87.67 | 830 | |
| Winneshiek | city | Illinois | United States | 42.34 | -89.53 | 849 | |
| Winnetka | city | Illinois | United States | 42.11 | -87.74 | 830 | |
| Winschester Lane North | city | Illinois | United States | 42.15 | -87.89 | 830 | |
| Winslow | city | Illinois | United States | 42.49 | -89.79 | 830 | |
| Winston | city | Illinois | United States | 42.33 | -90.36 | 954 | |
| Winston Village | city | Illinois | United States | 41.72 | -88.07 | 830 | |
| Winston Woods | city | Illinois | United States | 41.72 | -88.06 | 830 | |
| Winterrowd | city | Illinois | United States | 38.94 | -88.38 | 830 | |
| Winthrop Harbor | city | Illinois | United States | 42.48 | -87.82 | 830 | |
| Winthrop Harbor Station | city | Illinois | United States | 42.48 | -87.85 | 830 | |
| Winthrop Village | city | Illinois | United States | 42.09 | -88.04 | 830 | |
| Witt | city | Illinois | United States | 39.26 | -89.35 | 830 |