When Were All 50 States Established?
When Were All 50 States Established? State Entry Date 47. New Mexico January 6, 1912 48. Arizona February 14, 1912 49. Alaska January 3, 1959 50. HawaiiAugust 21, 1959 When did the US go from 48 to 50 states? Welcome, Alaska and Hawaii: 1959 was the year the U.S. went from 48 to 50 states.