Because I like tables better... Some comments are added at obvious places where the numbers need to be explained, if I can.
The next post will be adding the Republican primary voters into the mix...
Black Population 50%+Jefferson: 86% black (88% Obama, 11% Clinton)
Claiborne: 85% black (80% Obama, 17% Clinton)
Holmes: 81% black (81% Obama, 17% Clinton)
Humphreys: 74% black (75% Obama, 22% Clinton)
Coahoma: 73% black (69% Obama, 28% Clinton) - in general, Clinton ran better among upper Miss. river blacks than lower Miss. river ones
Sunflower: 72% black (71% Obama, 27% Clinton)
Tunica: 72% black (67% Obama, 30% Clinton) - see Coahoma
Leflore: 71% black (79% Obama, 19% Clinton)
Noxubee: 70% black (80% Obama, 12% Clinton)
Quitman: 69% black (64% Obama, 31% Clinton) - see Coahoma
Wilkinson: 69% black (80% Obama, 17% Clinton)
Sharkey: 68% black (73% Obama, 25% Clinton)
Washington: 67% black (80% Obama, 20% Clinton)
Hinds: 66% black (81% Obama, 19% Clinton)
Bolivar: 65% black (77% Obama, 22% Clinton)
Issaquena: 60% black (66% Obama, 30% Clinton) - see Coahoma
Tallahatchie: 60% black (63% Obama, 33% Clinton) - see Coahoma
Kemper: 59% black (78% Obama, 20% Clinton) - no good explanation
Clay: 57% black (74% Obama, 24% Clinton)
Jefferson Davis: 57% black (73% Obama, 24% Clinton)
Adams: 56% black (74% Obama, 24% Clinton)
Yazoo: 55% black (70% Obama, 28% Clinton)
Jasper: 52% black (69% Obama, 29% Clinton)
Copiah: 51% black (69% Obama, 29% Clinton)
Pike: 50% black (69% Obama, 29% Clinton)
Black Population 33-50%Marshall: 49% black (60% Obama, 38% Clinton)
Panola: 48% black (61% Obama, 36% Clinton)
Warren: 47% black (70% Obama, 29% Clinton)
Montgomery: 45% black (61% Obama, 36% Clinton)
Lowndes: 44% black (76% Obama, 23% Clinton) - no good explanation
Walthall: 44% black (62% Obama, 35% Clinton)
Winston: 44% black (65% Obama, 32% Clinton)
Amite: 43% black (62% Obama, 34% Clinton)
Chickasaw: 42% black (56% Obama, 41% Clinton)
Grenada: 41% black (62% Obama, 36% Clinton)
Lauderdale: 41% black (72% Obama, 27% Clinton) - GOP turnout about 85% of DEM
Attala: 40% black (58% Obama, 39% Clinton)
Leake: 39% black (62% Obama, 35% Clinton)
Scott: 39% black (62% Obama, 35% Clinton)
Yalobusha: 39% black (56% Obama, 42% Clinton)
Oktibbeha: 38% black (73% Obama, 26% Clinton) - Mississippi State University
Wayne: 38% black (51% Obama, 45% Clinton)
Madison: 37% black (77% Obama, 23% Clinton) - Jackson suburbs (somewhat), GOP turnout about 90% of DEM
Covington: 36% black (58% Obama, 40% Clinton)
Franklin: 36% black (58% Obama, 38% Clinton)
Forrest: 35% black (60% Obama, 39% Clinton)
Simpson: 35% black (62% Obama, 36% Clinton)
Benton: 34% black (42% Obama, 55% Clinton)
Carroll: 34% black (54% Obama, 44% Clinton)
Clarke: 34% black (66% Obama, 33% Clinton) - no good explanation
Marion: 33% black (54% Obama, Clinton 43%)
Black Population >33%Lawrence: 32% black (55% Obama, 42% Clinton)
Choctaw: 31% black (52% Obama, 44% Clinton)
Monroe: 31% black (50% Obama, 47% Clinton)
Tate: 31% black (51% Obama, 47% Clinton)
Lincoln: 30% black (59% Obama, 39% Clinton) - no good explanation
Newton: 30% black (62% Obama, 36% Clinton) - GOP turnout about 80% of DEM
Calhoun: 29% black (43% Obama, 53% Clinton)
Greene: 27% black (37% Obama, 59% Clinton)
Jones: 27% black (45% Obama, 54% Clinton)
Lee: 26% black (44% Obama, 54% Clinton)
Lafayette: 25% black (56% Obama, 42% Clinton) - Ole Miss University
Smith: 24% black (43% Obama, 54% Clinton)
Harrison: 23% black (54% Obama, 45% Clinton) - no good explanation here or in Jackson (GOP didn't show up?)
Perry: 23% black (40% Obama, 57% Clinton)
Jackson: 22% black (55% Obama, 43% Clinton) - see Harrison
Neshoba: 21% black (51% Obama, 45% Clinton) - as many votes in GOP primary as DEM, Indian reservation (14%)
Webster: 21% black (37% Obama, 60% Clinton)
DeSoto: 19% black (45% Obama, 54% Clinton) - Memphis exurbs, 4,000 more voted in the GOP primary.
Rankin: 19% black (61% Obama, 38% Clinton) - Jackson suburbs, voted 2-1 in the GOP primary
Stone: 19% black (40% Obama, 58% Clinton)
Tippah: 17% black (26% Obama, 70% Clinton)
Lamar: 15% black (37% Obama, 61% Clinton)
Pontotoc: 15% black (33% Obama, 64% Clinton)
Union: 15% black (27% Obama, 70% Clinton)
Prentiss: 14% black (19% Obama, 74% Clinton)
Pearl River: 12% black (35% Obama, 63% Clinton)
Alcorn: 11% black (22% Obama, 76% Clinton)
George: 9% black (22% Obama, 73% Clinton)
Hancock: 7% black (30% Obama, 68% Clinton)
Itawamba: 7% black (15% Obama, 80% Clinton)
Tishomingo: 4% black (13% Obama, 82% Clinton)