http://www.religioustolerance.org/chr_dira.htm

Variation in divorce rates among Christian faith groups:
Denomination (in order of decreasing divorce rate) % who have been divorced
Non-denominational (small conservative groups; independents) 34%
Baptists 29%
Mainline Protestants 25%
Mormons 24%
Catholics 21%
Lutherans 21%


Variation in divorce rates by religion:
Religion % have been divorced
Jews 30%
Born-again Christians 27%
Other Christians 24%
Atheists, Agnostics 21%

Variation in divorce rates by age:
Age group % have been divorced
Baby boomers (33 to 52 years of age) 34%
Builders (53 to 72 years of age) 37%
Seniors (above 72 years of age) 18%

Variation in divorce rates by location:
The Barna Group study found:

Area % are or have been divorced
South 27%
Midwest 27%
West 26%
Northeast 19%