Roughly 6 in 10 Americans say religion is a "very important" part of their lives and believe religion can answer all or most of today's problems. A majority of Americans say they attend religious services at least once a month, including a third who go every week, and 6 in 10 are members of a church or synagogue. More than 8 in 10 Americans are Christian, including roughly half who are Protestant and about a quarter who are Catholic. Fewer than 1 in 10 Americans have no religious affiliation at all. In regard to whom they would vote for in this year's election, Catholics slightly favor presumptive Democratic candidate John Kerry over President George W. Bush, while white Protestants would be much more likely to vote for Bush than Kerry.
According to a June 3-6 Gallup Poll, 59% of adults nationwide say religion is a very important part of their lives. An additional 26% of Americans say religion is fairly important to them. Just 15% of respondents say religion is not very important. The percentage of Americans saying religion is very important has not fluctuated significantly over the past decade, with yearly averages ranging between 57% and 61% from 1993 through 2003.
About two-thirds of Americans, 64%, belong to a church or synagogue. Self-reported church membership has fluctuated slightly since the early 1990s, with yearly averages ranging between the current level and 70% (in 1999).
The latest poll also shows that, when given a choice, 61% of Americans say that "religion can answer all or most of today's problems," while 24% feel that "religion is largely old-fashioned and out-of-date." Over the last decade, Gallup has generally found about 6 in 10 Americans saying religion can answer today's problems, with the exception for a brief period from 1998 to 2000, when the percentage saying that religion could solve today's problems was slightly higher.
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http://www.gallup.com/content/default.aspx?ci=12115