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| Designation | Symbol / Emblem |
| Beverage | Milk |
| Bird | Blue Hen Chicken (University of Delaware) |
| Bug | Lady Bug |
| Butterfly | Tiger Swallowtail (Pterourus glaucus) |
| Colors | Colonial Blue and Buff |
| Flag | Flag of Delaware |
| Fish | Weakfish (Cynoscion genus) |
| Floral Emblem | Peach Blossom |
| Flower | Peach Blossom |
| Fossil | Belemnite (Ancestor of the modern squid.) |
| Herb | Sweet Golden Rod (Solidago odora) |
| Macroinvertebrate | Stonefly (Order Plecoptera) |
| Marine Animal | Horseshoe Crab |
| Mineral | Sillimanite |
| Soil | Greenwich loam* (a course, loamy, mixed, semiactive, mesic, Typic Hapludult) |
| Song | Our Delaware by George B. Hynson and Donn Devine, music by Will M. S. Brown |
| Star | Delaware Diamond, located in the constellation of Ursa Major (Great Bear). |
| Tree | American Holly (Aquifoliaceae Ilex opaca) |