When you factor in overseas distribution, it is the largest Catholic newspaper in the world.
It was condemned by at least one Catholic Bishop (and myself ;)), so it is the largest anti-Catholic paper.
Besides, "largest" doesn't really mean anything in faith. God is not like Andy Greeley; He doesn't look at opinion polls, click and see how many people were saved in the Flood.
Since a birdcage liner (apologies to innocent caged birdies everywhere) or fishwrapper (so little respect for the dearly departed piscene community) that promotes abortion and homosexuality and the likes of radical ex-nun Frances Kissling and the Mad Monk of Milwaukee Rembert (the lavender seminarian and cathedral and truth and Mass molester) Weakland, in its pages can hardly be described as Catholic, q.e.d. the NaCR is NOT the largest Catholic anything.
Overseas distribution is just a phenomenon of these rank heretics trying to go international.
This post is written on the potentially false planted axiom that NCR has such a circulation as to justify the claim. The actual circulation of NaCR or of actually Catholic publications It certainly is not even vaguely Catholic so the claim fails in any event. I also do not know whether the average subscriber is 68 years old, but it seems likely since that is the appropriate age for he average "spirit of Vatican II" phony posing as Catholic. Of course, not all 68s are phonies but their age group has suffered an unusual percentage of formerly breathless revolutionaries overwhelmed by the spontaneity of it all in youth and gargling sulfuric acid in their collective (ooooh!) frustration over the failure of their project of deCatholicizing Catholicism now that they know that it will not come to pass even as they are about to pass in that other way.