What states were admitted to the Union as slave states?

Answer 1

Joy's answer is a bit off, because you did not ask which states WERE slave states, but which were ADMITTED *AS* slave states.

First of all, it would be incorrect to speak of the original 13 states of having been "admitted" as either free or slave states. In fact, of the original states, even those we think of as "free states" had not yet emancipated all their slaves when the Constitution was first ratified. (New Jersey still had a few at the beginning of the Civil War.)

Thus the issue only applies to those states subsequently ADDED to the Union, and even then scarcely to the first two slave states added. It became a hot issue when states began to be admitted that specifically EXCLUDED slavery in their constitutions. This began with the admission to statehood of territories covered by the Northwest Ordinance of 1787 (which disallowed slavery in the Northwest Territory). That process began with Ohio's admission (as the 17th state) in 1803, though the "slave state" vs. "free state" debates -- and the practice of attempting to keep things balancing by admitting them in pairs, one slave alongside one free, began AFTER the War of 1812. (The most famous example involved the admision of Missouri [slave] and Maine [free].)
http://en.wikipedia.org/wiki/Free_state#Background

At any rate, here are the nine slave states we might say were "admitted to the Union AS slave states", though the "slave state vs. free state" distinction was not fully in place for the first two.

#15 Kentucky (June 1, 1792)
#16 Tennessee (June 1, 1796)

#18 Louisiana (April 30, 1812)

#20 Mississippi (December 10, 1817)
.... < after free state Illinois (1816)>
#22 Alabama (December 14, 1819)
....
#24 Missouri (August 10, 1821)
....
#25 Arkansas (June 15, 1836)
....
#27 Florida (March 3, 1845)
....
#28 Texas (December 29, 1845)
....
http://en.wikipedia.org/wiki/List_of_U.S._states_by_date_of_statehood
compare the pairs -- http://en.wikipedia.org/wiki/Free_state#Slave_and_free_state_pairs

(If you are interested in the status of the others, the section of the article immediately preceding the last link lists of the "lineup" of slave and free of the states that preceded these.)

Answer 2

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RE:
What states were admitted to the Union as slave states?

Answer 3

Joy M is right, except for Oklahoma, which was not admitted as a state until 1907. While there were certainly slaves in the Oklahoma Territory before the Civil War, Oklahoma was not yet a state, so it does not fit the condition of your question.

Answer 4

The slave states were Texas, Oklahoma (not known by that name then), Missouri, Arkansas, Louisiana, Mississippi, Tennessee, Kentucky, Alabama, Georgia, Florida, Virginia (also included area that is now West Virginia), North Carolina, Delaware, Maryland and South Carolina.

Answer 5

None, because they had to be free states in order to be re-admitted into the union. I t was apart of the Emancipation Proclamation