This is a table apparently by Prof. Hansen dated 09/02. At the bottom he notes: "How to read this chart: Virginia joined the CSA on April 17,1861; according to the 1860 census, the state had 490,865 slaves (30.7% of the state's total population) and 52,128 slaveholders (4.7% of the state's free population). ... Refer to CENSUS DATA for more statistical information."
[nc note: The below is not an image file. It is a recreation of the table at the link. For precise viewing of the table, see the link.]
HIS 121/269 Research Document
Census Table 7. Secession Date and Slave Popluation (1860)
State
Secession
Date
Slaves
(S)S %=20 of Total Pop. Slave-
holders
(SH)SH=20 %-of
free
personsS.Carolina 12/20/60 402,406 57.2 26,701 8.9 Mississippi 1/09/61 436,631 55.2 30,943 8.7 Florida 1/10/61 61,745 44.0 5,152 6.5 Alabama 1/11/61 435,080 45.1 33,730 6.4 Georgia 1/18/61 462,198 43.7 41,084 6.9 Louisiana 1/26/61 331,726 46.9 22,033 5.9 Texas 2/1/61 182,566 30.2 21,878 5.2 Virginia 4/17/61 490,865 30.7 52,128 4.7 Arkansas 5/6/61 111,115 25.5 11,481 3.5 N.Carolina 5/20/61 331,059 33.4 34,658 5.2 Tennessee 6/8/61 275,719 24.8 36,844 4.4 Kentucky NA 225,483 19.5 38,645 4.2 Maryland NA 87,189 12.7 13,783 2.3 Missouri NA 114,931 9.7 24,320 2.3
NA = Not Applicable (border states that did not join the Confederacy)
LH 09/02
Ignore the "= 20" which appears twice in the headings.