I was too vague, to be honest. I should've asked if Lutherans are the most common Protestants in America. We really don't discriminate between the different sects here in England, seeing as we have a national church.
Nope. Biggest faith is Catholicism with over 50,000,000 followers. Baptism is the second largest with over 30,000,000. There's like 9,000,000 Lutherans here
The official what religion are you + discussion thread