List of Illinois state symbols
The state of Illinois has adopted numerous symbols over time.
Insignia
| Type | Symbol | Adopted | Image | |
| Flag | Flag of Illinois | 1969 | ||
| Centennial flag | Centennial Flag of Illinois | 1918 | ||
| Sesquicentennial flag | Sesquicentennial Flag of Illinois | 1968 | ||
| Seal | Seal of Illinois | 1867 |