| Official Name: | Philadelphia, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Cass |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 620 |
| Coordinates: | 39.9239°N -90.1172°W |
| Area Code: | 217 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 415602 |
Philadelphia is an unincorporated community in Cass County, Illinois, United States. Philadelphia is located on Illinois Route 125, southeast of Virginia. Vernon Huber, the 36th Governor of American Samoa, was born in Philadelphia.[1]
The community was named for Philadelphia, Pennsylvania.[2]