Long County also voted for Hoover 70.7% after giving John Davis 88.5% in 1924. For whatever reason it clearly had an extreme level of anti-Catholicism in the 20th century.
Yeah that’s one reason why I assumed LBJ's the error. That doesn't explain why LBJ did so well in rural Southern GA
America at the Polls seems to confirm that Long County did go 84 percent for Johnson. Actually, that it swung so hard against Smith in 1928 is, as Valdimer Key demonstrated in his
Southern Politics in State and Nation, clear evidence that racial issues were
less significant than in adjacent counties, although as of 2000 the county was 24 percent black. To paraphrase Key, the rebels of 1928 were the loyalists of 1948 (and the loyalists of 1964).
Key said Long County had a different (Lutheran, if I recall correctly) religious tradition from other rural Georgia counties and was more anti-Catholic.