What states didn't exist in 1908?

In 1908, several states that are part of the United States today did not yet exist. Notably, Alaska and Hawaii were not admitted as states; Alaska became the 49th state in 1959, and Hawaii followed as the 50th state in 1960. Additionally, Arizona and New Mexico were still territories, achieving statehood in 1912. Other states, like Oklahoma, were also not yet part of the Union, as it became a state in 1907.