48 (last of the contiguous states)
The last 2 states added to the Union were Alaska and Hawaii.
1889. North and South Dakota, Montana, and Washington become states
to many slave states being added into the union
Washington state was added to the Union on November 11, 1889. It was the 42nd state to be added. Several states were added that year and the year after.
Maine
i dont actually know for sure, but i believe that states had to have boundaries and duties before they could be added. the states had certain powers that the government didnt have, such as taxing people. states had to comprimise and cooperate by giving full faith and credit to public civil acts of the other states. they also had to return slaves and servants who crossed the border.
Under the Missouri Compromise of 1820 Missouri was admitted as a slave state and Maine as a free state.
No states were added to the union while Pierce was president.
Possibly
No states were added to the union while Van Buren was President.
Warren G. Harding served as President of the United States between 1921 and 1923. There were no US states added to the union between these two years.
Two states were added to the Union during Taft's term; New Mexico & Arizona.
Alaska, in 1959.
Alaska is the 49th state added to the union and shortly after Hawaii became the 50th state added. Both in the year 1959.
Hawaii was the 50th state added to the union.
48 (last of the contiguous states)