The state of Illinois has adopted numerous symbols over time.
| Type | Symbol | Adopted | Image | Ref. |
|---|---|---|---|---|
| Flag | Flag of Illinois | 1969 | | |
| Centennial flag | Centennial Flag of Illinois | 1918 | | |
| Sesquicentennial flag | Sesquicentennial Flag of Illinois | 1968 | | |
| Seal | Seal of Illinois | 1867 | |
| Type | Symbol | Image | Law [notes 1] [1] | Adopted |
|---|---|---|---|---|
| Amphibian | Eastern tiger salamander (Ambystoma tigrinum) | | 5 ILCS 460/85 | 2005 [2] |
| Animal | White-tailed deer (Odocoileus virginianus) | | 5 ILCS 460/45 | 1982 [2] |
| Artifact | Pirogue | 5 ILCS 460/63 | 2017 [1] | |
| Bird | Northern cardinal (Cardinalis cardinalis) | | 5 ILCS 460/10 | 1929 [2] |
| Exercise | Cycling | | 5 ILCS 460/67 | 2018 [1] |
| Fish | Bluegill (Lepomis macrochirus) | | 5 ILCS 460/50 | 1986 [2] |
| Flower | Violet (Viola spp.) | | 5 ILCS 460/40 | 1908 [2] [3] |
| Folk dance | Square dance | 5 ILCS 460/65 | 1990 [4] | |
| Fruit | Gold Rush Apple (Malus × domestica) | | 5 ILCS 460/57 | 2007 [1] |
| Fossil | Tully monster (Tullimonstrum gregarium) | | 5 ILCS 460/60 | 1989 [3] |
| Grain | Corn | | 5 ILCS 460/56.5 | 2018 [5] |
| Horse | Thoroughbred horse (Equus caballus) | | 5 ILCS 460/90 | 2006 [1] |
| Insect | Monarch butterfly (Danaus plexippus) | | 5 ILCS 460/15 | 1975 [2] |
| Mineral | Fluorite (Calcium fluoride) | | 5 ILCS 460/25 | 1965 [3] |
| Motto | "State sovereignty, national union" | 5 ILCS 460/5 [notes 2] | 1818 [6] | |
| Nickname | "The Prairie State" | Traditional [3] | ||
| Pet | Shelter dogs and shelter cats | 5 ILCS 460/47 | 2017 [1] | |
| Pie | Pumpkin pie | | 5 ILCS 460/100 | 2016 [1] |
| Prairie grass | Big bluestem (Andropogon gerardii) | | 5 ILCS 460/55 | 1989 [3] |
| Reptile | Painted turtle (Chrysemys picta) | | 5 ILCS 460/90 | 2006 [1] |
| Rock | Dolostone | | 2022 [7] | |
| Slogan | "Land of Lincoln" | | 5 ILCS 460/30 | 1955 [3] |
| Snackfood | Popcorn | | 5 ILCS 460/80 | 2004 [1] |
| Snake | Eastern milk snake | | 5 ILCS 460/87 | 2022 [8] |
| Soil | Drummer silty clay loam (mesic Typic Endoaquoll) | | 5 ILCS 460/75 | 2001 [1] |
| Song | "Illinois" | 5 ILCS 460/35 | 1925 [9] | |
| Tartan | Illinois Saint Andrew Society Tartan | | 5 ILCS 460/95 | 2012 [1] |
| Theatre | The Great American People Show | 5 ILCS 460/70 | 1995 [1] | |
| Tree | White oak (Quercus alba) (replaced "Native Oak" adopted in 1908) | | 5 ILCS 460/40 | 1973 [2] [3] |
| Vegetable | Sweet corn | | 5 ILCS 460/56 | 2015 [1] |
| Wildflower | Milkweed (Asclepias spp.) | | 5 ILCS 460/43 | 2017 [1] |
| Mushroom | Giant Puffball (Calvatia Gigantea) | 2024 |