Places beginning with WO in Illinois, United States
- Woburn
- Wolcott Gardens (subdivision)
- Wolcotts and Bushnells Additions (subdivision)
- Wolf Creek
- Wolf Lake
- Wolf Lake
- Wolfs
- Womac
- Wonder Center
- Wonder Lake
- Woodbine
- Woodbine, Township of
- Woodburn
- Woodbury
- Woodbury, Township of
- Woodcrest
- Woodcrest
- Woodcrest (subdivision)
- Wood Dale
- Woodford
- Woodford County
- Woodhull
- Woodland
- Woodland
- Woodland Acres
- Woodland Addition
- Woodland Estates (subdivision)
- Woodland Hills
- Woodland Hills
- Woodland Hills
- Woodland Junction
- Woodland Shores
- Woodland, Township of
- Woodland, Township of
- Woodlawn
- Woodlawn Court (subdivision)
- Woodlawn (subdivision)
- Woodridge
- Woodridge
- Wood River
- Wood River, Township of
- Woodruff
- Woodruff Corners
- Woods
- Woodside
- Woodside, Township of
- Woodson
- Woodson Election Precinct
- Woodstock
- Woodstock, Township of
- Woodvale
- Woodville
- Woodville (historical)
- Woodville, Township of
- Woodworth
- Woody
- Woodyard
- Woosung
- Woosung, Township of
- Worden
- Worth
- Worth, Township of
- Worth, Township of