<1% of U.S. adults identify as interdenominational Protestants in the mainline tradition.

19% of this group lives in the Midwest, 8% live in the Northeast, 42% live in the South and 31% live in the West.

11% are between the ages of 18 and 29, 29% are ages 30 to 49, 34% are ages 50 to 65 and 23% are 65 and older.