South Dakota was admitted as the 40th state in 1889 on November, 2. Acquired in the Louisiana Purchase, the region became part of the Dakota Territory in 1861 and was split off from North Dakota at the time it achieved statehood. Both North and south Dakota entered the Union at the same time. Celebrate your state's history by displaying state symbols, animals, and state flags. Find your supplies at Flagandbanner.com today.