Diamond State may refer to:
The U.S. State of Delaware, unofficially nicknamed "The Diamond State" Diamond State Athletic Conference, a high school sports league The U.S. State of Arkansas has the symbol of the diamond on its official state flaghttps://www.sos.arkansas.gov/education/arkansas-history/history-of-the-flag and has often been referred to as "The Diamond State" since the discovery of diamonds there in 1906.https://somewhereinarkansas.com/arkansas-nicknames/ Crater of Diamonds State Park SS Diamond State, a crane ship of the United States Navy
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