The United States went through multiple expansions westward. The first major accessions were the Louisiana Purchase. Texas and California joined the Union after being under Mexican administration. Alaska came after being purchased from the Russian Empire. Hawaii was the latest to join, and the question of Puerto Rico acceding the Union as a potential 51st State is continuous policy question.
No states were admitted in 1800.
Congress
New York
New Mexico was admitted into the Union on January 6, 1912 becoming the 47th state to join the union. William Howard Taft was President of the United States when New Mexico was admitted into the union.
Alaska was admitted into the Union on January 3, 1959 becoming the 49th state to join the Union. Hawaii was admitted into the Union on August 21, 1959 becoming the 50th state to join the union.
States admitted in the 20th century: Oklahoma, New Mexico, Arizona, Alaska, and Hawaii.
New states can be admited to the union only with th e approval of who?
The United States Congress is the governmental body that grants new states admission to the Union. Hawaii is the last state to have been admitted to the Union.
New Mexico was admitted into the Union on January 6, 1912 becoming the 47th state to join the union. Arizona was admitted into the Union on February 14, 1912 becoming the 48th state to join the Union.
Florida was admitted into the Union on March 3, 1845 becoming the 27th state to join the Union. Texas was admitted into the Union on December 29, 1845 becoming the 28th state to join the Union. Iowa was admitted into the Union on December 28, 1846 becoming the 29th state to join the Union. Wisconsin was admitted into the Union on May 29, 1848 becoming the 30th state to join the Union.
West Virginia was admitted to the union of the United States of America on June 20, 1863.
New Mexico was admitted into the Union on January 6, 1912 becoming the 47th state to join the union. William Howard Taft was President of the United States when New Mexico was admitted into the union.