Idaho is home to over 1.75 million people, making it the 39th most populous state in the US. The majority of Idaho's population is concentrated in the capital city of Boise and its neighbouring residents, with other large cities such as Coeur d'Alene, Nampa, Pocatello, and Twin Falls adding to the state's population. Idaho also includes around 11 tribal areas that are occupied by several American Indian nations. In terms of age demographics, just under 24% of residents are aged under 18 while those aged 65 or over make up 14% of Idaho’s population. The median age for Idaho’s population stands at 36 years old with a gender split of 49% female and 51% male. In terms of education level, 91% of adults in Idaho have earned their high school diploma or more with almost 25% having obtained a bachelor’s degree or higher from an accredited college or university.