Southern Baptist Convention--Number of Congregations (2000)
Note California with more SBC churches than Arkansas.
Southern Baptist Convention--Number of Adherents (2000)
Southern Baptist Convention--Rates of Adherence Per 1000 Population (2000)
No state is more Southern Baptist than Mississippi.
I believe one is compelled to conclude that the SBC is indeed a quite heavily southern denomination, by any measure.
Wonder what a CBF map would look like?