"United States -
14,347,027/Catholics 65,000,000/Protestants"
Not to split hairs but those stats are from 1910.
I think the last numbers I saw had about 65,000,000 Catholics in the US. Still, there are more protestants than Catholics in the US.
Not sure what to say . . .
Here are the more up-to-date
numbers, and their link:
---------------------------------------------------------
Largest Religious Groups in the United States of America
Christians in the US (1990) = 151,225,000
Protestants in the US (53%, 2001) = 80,149,250
Catholics in the US (23%, 2001) = 34,781,750
(Pew Research Council percentages)