North and South Dakota joined the United States on November 02, 1889. North Dakota has a total area of 183,108 square kilometers and has a total population of more than 757 thousand people while South Dakota has a total area or 78,116 square kilometers and a total population of more than 865 thousand people. The United State of America has 50 states and here are some of the states according to the date they were admitted as a state of America: Georgia on January 02, 1788, South Carolina on Mary 23, 1788, New Hampshire on June 21, 1788, Virginia on June 25, 1788, New York on July 26, 1788, Maine on March 15, 1820, Missouri on August 10, 1821, Arkansas on June 15, 1836, California on September 09, 1850, Minnesota on May 11, 1858, Oregon on February 14, 1859, Kansas on January 29, 1861, Utah on January 04, 1896, Oklahoma on November 16, 1907, New Mexico on January 06, 1912 and Hawaii on August 21, 1959.