11% of U.S. adults identify as mainline Protestants.

28% of this group lives in the Midwest, 17% live in the Northeast, 37% live in the South and 18% live in the West.

11% are between the ages of 18 and 29, 24% are ages 30 to 49, 27% are ages 50 to 65 and 38% are 65 and older.