Economics helps explain why suicide is more common among Protestants

“One key is that the suicidal tendency of Protestants is more pronounced in areas with low church attendance. The strongest effect is thus more likely to be found in areas with little social integration rather than in areas with high devotion to the Protestant doctrine.

Finally, more contemporary data shows that, while Protestants still have a higher suicide rate than Catholics, it is highest among people without a religious affiliation who are not subject to theological doctrine.”