According to the Census, Louisiana is the "Most Southern" SEC state.

It turns out Louisiana is the "most Southern" SEC state. Real data, real talk.

By Percentage residents state-native born:
Louisiana – 78.5
Mississippi – 71.4
Alabama – 70.2
Kentucky – 70.2
Tennessee – 61.4
Arkansas – 61.2
South Carolina – 58.0
Georgia – 55.3
Florida – 35.0

*Census data includes Missouri in the Midwest region


By Percentage non-native, but born in other states from The South:
South Carolina – 18.0
Mississippi – 17.5
Georgia – 17.3
Tennessee – 17.3
Alabama – 15.8
Arkansas – 15.3
Florida – 11.0
Louisiana – 10.6
Missouri – 8.8
Kentucky -8.6
Texas -8.2

Most Southern, including native-state-born Southerners + migrants born in other Southern states:
Louisiana – 89.1
Mississippi – 88.9
Alabama – 86.0
Kentucky – 78.8
Tennessee – 78.7
Arkansas – 76.5
South Carolina - 76.0
Georgia – 72.6
Texas – 68.7
Florida – 46.0
Missouri – 8.8

Highest % Foreign born (to non-U.S. citizen parents or territory):
Florida – 19.3%
Texas – 16.3%
Georgia – 9.7

Most “Western” by percentage:
Arkansas – 6.1%
Texas – 5.1
Least “Western”:
Mississippi & Kentucky tie 2.1%

Most Midwestern:
Missouri 79.9%
Florida 10.9%
Least Midwestern:
Louisiana 2.8%

SOURCE: Census Reporter dot org

Census Regions