Situated in the northwestern region of the United States.Idaho is the 43rd state to join the Union (on July 3, 1890 ) and with a population of 1,634,464 is today the 39th most populous state. Known as the Aloha State. State Abbreviation: ID Capital City:Boise Largest City:Boise Number of Counties: 44 Area: 83,570 square miles Major Rivers: Bear, Big Lost, Boise, Bruneau, Clearwater, Lemhi, Lochsa, Middle Fork Salmon, Owyhee, Payette, Salmon, Selway, Snake, St. Joe and Weiser River Major Lakes: Bear, Coeur d'Alene, Grays, Lake Walcott, Pend Oreille and Priest Lake. Highest Point:Borah Peak 12,662 feet above sea level State Motto:Esto perpetua, "Let it be eternal" State Bird: Mountain bluebird State Insect: Monarch Butterfly State Fish: Cutthroat trout State Tree:Western White Pine State Flower:Syringa, mock orange State Gemstone:Star garnet