United States Of America Population 2024 By Religion. The survey is weighted to be representative of the u.s. A new study shows that america's christian majority has been shrinking for years, and if recent trends continue, christians could make up less than half the u.s.

Fifty years ago, in 1973, 87% of u.s. Catholics are one of the largest religious groups in the united states, outnumbering any single protestant denomination.