[ansel12]

One thing about that map is that it merely shows the largest single denomination in the county, if the county is absolutely diverse with hundreds of churches and one particular denomination claims one member more than any of the others, then it is painted as THE church of that county.

[Alamo-Girl]

The religious body of the counties marked with a dot are dominant (50%+ of the population) the others have a majority but are not dominant (<50%).