How many states were slave states, and free states in 1861?

Delaware

1787 New Jersey

(Slave until 1804) 1787 Georgia 1788 Pennsylvania 1787 Maryland 1788 Connecticut 1788 South Carolina 1788 Massachusetts 1788 Virginia 1788 New Hampshire 1788 North Carolina 1789 New York

(Slave until 1799) 1788 Kentucky 1792 Rhode Island 1790 Tennessee 1796 Vermont 1791 Louisiana 1812 Ohio 1803 With the addition to Oregon (1859) and Kansas (1861), the number of free states grew to 19 while the number of slave states remained at 15.

After 1812, and until 1850, maintaining the balan