If the following conflicts a bit with your team site don't sweat it. These are from the SEC Office and do not include titles won while teams were a member of another conference, and do not include football titles prior to the AP and UPI. It includes 1 title won by a team no longer a member of the SEC but they were in the SEC when they won the title. The team may surprise you.
MEN
National Championships Won
Baseball: 9 (UGA - 1, LSU - 6, USC - 2)
Basketball: 11 (FLA - 2, KY - 8, ARK - 1)
Boxing: 1 LSU
Cross Country: 8 (TEN - 1, ARK - 7)
Football: 21 (ALA - 9, AUB - 2, FLA - 3, UGA - 1, LSU - 3,
Miss - 1, TEN - 2)
Golf: 10 (FLA - 4, UGA - 2, LSU - 4)
Swimming & Diving: 11 (AUB - 8, FLA - 2, TEN - 1)
Tennis: 7 (UGA - 6, TULANE - 1)
Indoor Track & Field: 17 (ARK - 11, FLA - 3, LSU - 2, TEN - 1)
Outdoor Track & Field: 19 (ARK - 11, FLA - 1, LSU - 4, TEN - 3)
WOMEN
National Championships:
Basketball: 8 TEN - 8
Bowling: 1 VAN - 1
Cross Country: 1 KEN - 1
Golf: 4 (ALA - 1, FLA - 2, UGA - 1)
Gymnastics: 16 (ALA - 6, UGA - 10)
Soccer: 1 FLA - 1
Softball: 1 ALA - 1
Swimming & Diving: 11 (AUB - 5, FLA - 2, UGA - 4)
Tennis: 8 (FLA - 6, UGA - 2)
Indoor Track & Field: 14 (FLA - 1, LSU - 11, TEN - 2)
Outdoor Track & Field: 16 (AUB - 1, LSU - 14, USC - 1)
Equestrian is not an NCAA title and is therefore not listed here but the SEC has picked up a few of those as well.