- Located near the interchange
of I-57 and IL 13 between Carbondale and Harrisburg
- Latitude: 37°43'50" N (+37.7306)
- Longitude: 88°55'59" W (-88.9331)
- Elevation: 448 feet above sea level
- Civil township: West Marion
- Land area: 12.8 square miles
- Water area: 0.70 square miles (446.1 acres)
As the crow flies, Marion is...
| Year | Population | Percent change |
|---|
| 1990 | 14,545 | -- |
| 2000 | 16,035 | +10.2% |