http://www.civil-war.net/pages/1860_census.html

Interesting data of the slave population and the % of families owning slaves.

The Deep South population was 44 (GA,AL)-57 (SC)% slaves. Slave ownership was 29% (LA) to 49% (MS).

The 4 border states slave population was 2% (DE) to 20% (KY) and
3 to 23% of families owning slaves.

For the 4 upper south states and Texas, the slave population was 25 (TN)-33 (NC) % and the ownerships was 20% (AR) to 28% (TX,NC).

The Deep South + recently annexed Texas seceded first. Arkansas with 20% was the only state to secede that had a lower % of slave owners than any of the non-seceding states. Kentucky had 23% while Missouri was 13% and Maryland 12%.