Place
- Country Club Hills, Illinois1
- Crest Hill, Illinois1
- Crestwood, Illinois1
- Crete, Illinois1
- Crystal Lake, Illinois1
- Crystal Lawns, Illinois1
- Custer Park, Illinois1
- D.C.1
- DC1
- DC GIS1
- DCGIS1
- Darien, Illinois1
- Deer Park, Illinois1
- Deerfield, Illinois1
- Des Plaines, Illinois1
- Diamond, Illinois1
- District of Columbia1
- Dixmoor, Illinois1
- Dolton, Illinois1
- Downers Grove, Illinois1