The 77th House District represents the communities of:
- Melrose Park
- Franklin Park
- Northlake
- Stone Park
- Bensenville
Parts of:
- Addison
- River Grove
- Elmwood Park
- Des Plaines
- Elk Grove Village
- Elmhurst
- Rosemont
Demographics
| Race/Ethnicity | % |
| Latino | 57.9% |
| White | 34.3% |
| Black | 4.2% |
| Asian | 3.8% |
| Native | 3.3% |
| Pacific | 0.1% |
Source: 2020 U.S. Census