UpAlphabetical listing of Places in Illinois
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Wabash Point | city | Illinois | United States | 39.44 | -88.42 | 830 | |
| Wacker | city | Illinois | United States | 42.06 | -90.05 | 830 | |
| Waddams Grove | city | Illinois | United States | 42.42 | -89.88 | 1020 | |
| Wadsworth | city | Illinois | United States | 42.43 | -87.92 | 830 | |
| Waggoner | city | Illinois | United States | 39.38 | -89.65 | 830 | |
| Wagon Creek Heaven | city | Illinois | United States | 37.58 | -88.90 | 830 | |
| Wahl's Subdivision | city | Illinois | United States | 42.12 | -87.84 | 830 | |
| Wakefield | city | Illinois | United States | 38.84 | -88.24 | 830 | |
| Waldo | city | Illinois | United States | 40.80 | -88.83 | 830 | |
| Waldron (historical) | city | Illinois | United States | 41.13 | -89.75 | 830 | |
| Walker | city | Illinois | United States | 41.62 | -88.21 | 830 | |
| Walker | city | Illinois | United States | 39.68 | -89.01 | 830 | |
| Walkers Grove | city | Illinois | United States | 41.41 | -87.74 | 830 | |
| Walkers Grove | city | Illinois | United States | 41.64 | -88.24 | 830 | |
| Walkerville | city | Illinois | United States | 39.39 | -90.50 | 830 | |
| Walla Walla | city | Illinois | United States | 39.20 | -88.19 | 830 | |
| Wallin Woods | city | Illinois | United States | 41.61 | -88.22 | 830 | |
| Wallingford | city | Illinois | United States | 41.37 | -87.94 | 830 | |
| Walnut | city | Illinois | United States | 40.48 | -89.37 | 830 | |
| Walnut | city | Illinois | United States | 41.56 | -89.59 | 830 | |
| Walnut Grove | city | Illinois | United States | 41.18 | -89.36 | 830 | |
| Walnut Grove | city | Illinois | United States | 40.62 | -90.56 | 830 | |
| Walnut Hill | city | Illinois | United States | 38.48 | -89.04 | 830 | |
| Walnut Prairie | city | Illinois | United States | 39.24 | -87.67 | 830 | |
| Walnut Ridge | city | Illinois | United States | 41.73 | -88.11 | 830 | |
| Walnut Woods | city | Illinois | United States | 41.72 | -88.10 | 830 | |
| Walpole | city | Illinois | United States | 37.94 | -88.55 | 400 | |
| Walsh | city | Illinois | United States | 38.09 | -89.85 | 830 | |
| Walshville | city | Illinois | United States | 39.07 | -89.62 | 830 | |
| Waltersburg | city | Illinois | United States | 37.38 | -88.56 | 830 | |
| Waltham | city | Illinois | United States | 41.43 | -89.01 | 830 | |
| Walton | city | Illinois | United States | 41.72 | -89.44 | 830 | |
| Waltonville | city | Illinois | United States | 38.21 | -89.04 | 830 | |
| Walz | city | Illinois | United States | 40.14 | -87.57 | 830 | |
| Wamac | city | Illinois | United States | 38.51 | -89.14 | 830 | |
| Wanborough (historical) | city | Illinois | United States | 38.38 | -88.09 | 830 | |
| Wanda | city | Illinois | United States | 38.83 | -90.04 | 830 | |
| Wanlock | city | Illinois | United States | 41.22 | -90.63 | 830 | |
| Wapella | city | Illinois | United States | 40.22 | -88.96 | 830 | |
| Ward | city | Illinois | United States | 37.85 | -89.24 | 400 | |
| Ward | city | Illinois | United States | 41.17 | -87.63 | 830 | |
| Ware | city | Illinois | United States | 37.45 | -89.39 | 341 | |
| Warner | city | Illinois | United States | 41.41 | -90.38 | 830 | |
| Warnock | city | Illinois | United States | 38.40 | -90.27 | 396 | |
| Warren | city | Illinois | United States | 42.50 | -89.99 | 997 | |
| Warrenhurst | city | Illinois | United States | 41.82 | -88.21 | 830 | |
| Warrensburg | city | Illinois | United States | 39.93 | -89.06 | 830 | |
| Warrenville | city | Illinois | United States | 41.82 | -88.17 | 830 | |
| Warrington | city | Illinois | United States | 39.61 | -87.94 | 830 | |
| Warsaw | city | Illinois | United States | 40.36 | -91.43 | 830 | |
| Wartburg | city | Illinois | United States | 38.29 | -90.20 | 830 | |
| Wartrace | city | Illinois | United States | 37.40 | -88.78 | 830 | |
| Wasco | city | Illinois | United States | 41.94 | -88.40 | 846 | |
| Washburn | city | Illinois | United States | 40.92 | -89.29 | 830 | |
| Washington | city | Illinois | United States | 40.70 | -89.41 | 830 | |
| Washington Heights | city | Illinois | United States | 41.71 | -87.66 | 830 | |
| Washington Park | city | Illinois | United States | 41.79 | -87.62 | 830 | |
| Washington Park | city | Illinois | United States | 38.64 | -90.09 | 416 | |
| Washington Park Court | city | Illinois | United States | 41.81 | -87.62 | 830 | |
| Wasson | city | Illinois | United States | 37.79 | -88.48 | 383 | |
| Wataga | city | Illinois | United States | 41.03 | -90.28 | 830 | |
| Water Edge Subdivision | city | Illinois | United States | 42.14 | -87.81 | 830 | |
| Water Valley | city | Illinois | United States | 37.56 | -89.18 | 830 | |
| Waterford (historical) | city | Illinois | United States | 40.34 | -90.13 | 830 | |
| Waterloo | city | Illinois | United States | 38.34 | -90.15 | 830 | |
| Waterman | city | Illinois | United States | 41.77 | -88.77 | 830 | |
| Watertown | city | Illinois | United States | 41.99 | -89.29 | 830 | |
| Watertown (historical) | city | Illinois | United States | 38.72 | -88.12 | 830 | |
| Watkins | city | Illinois | United States | 40.28 | -88.68 | 830 | |
| Watkins Ford | city | Illinois | United States | 37.54 | -88.63 | 830 | |
| Watseka | city | Illinois | United States | 40.78 | -87.74 | 830 | |
| Watson | city | Illinois | United States | 39.03 | -88.57 | 830 | |
| Wauconda | city | Illinois | United States | 42.26 | -88.14 | 830 | |
| Waukegan | city | Illinois | United States | 42.36 | -87.84 | 830 | |
| Wauponsee | city | Illinois | United States | 41.27 | -88.49 | 830 | |
| Waverly | city | Illinois | United States | 39.59 | -89.95 | 830 | |
| Wayland | city | Illinois | United States | 40.20 | -90.71 | 830 | |
| Wayne | city | Illinois | United States | 41.95 | -88.24 | 830 | |
| Wayne | city | Illinois | United States | 41.95 | -88.27 | 830 | |
| Wayne Center | city | Illinois | United States | 41.94 | -88.17 | 830 | |
| Wayne City | city | Illinois | United States | 38.35 | -88.59 | 413 | |
| Waynesville | city | Illinois | United States | 40.24 | -89.12 | 830 | |
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