Places beginning with HO in Illinois, United States
- Hodges Park
- Hodgeville
- Hodgkins
- Hoffman
- Hoffman Estates
- Hogue Town
- Holbrook
- Holcomb
- Holcombville Corners
- Holden
- Holder
- Holiday Hills
- Holiday Hills (subdivision)
- Holiday Shores
- Holland
- Holland, Township of
- Holliday
- Hollis
- Hollis, Township of
- Hollowayville
- Hollywood Heights
- Holmes
- Holmes Corner
- Homberg
- Homer
- Homer Glen
- Homer, Township of
- Hometown
- Homeward Hill
- Homewood
- Honey Bend
- Honey Creek
- Honey Creek, Township of
- Honey Creek, Township of
- Honeymoon Row (subdivision)
- Honey Point, Township of
- Hoodville
- Hookdale
- Hooper
- Hoopeston
- Hooppole
- Hoosier
- Hoosier, Township of
- Hope
- Hopedale
- Hopedale, Township of
- Hope, Township of
- Hopewell
- Hopewell, Township of
- Hopkins Park
- Hopkins, Township of
- Hopper
- Horace
- Horatio Gardens
- Hord
- Hornsby
- Horseshoe
- Horton
- Houston
- Houston, Township of
- Howard
- Howard District
- Howards Point (historical)
- Howardton
- Howe Terrace
- Hoyleton
- Hoyleton, Township of