The Pre-Trib Rapture position is not taught by most denominations.  Many people allege that the idea cannot be found in history prior to 1830.  One thing is sure; all or nearly all Christian denominations prior to 1830 reject the idea.  The Catholic, Orthodox, Anglican, Presberterian, Lutheran, Quaker, etc, reject the idea.  The official position of the Catholic Church is that the concept "cannot safely be taught" (CCC 676). 

Even some post-1830 denominations reject the idea, including, the United Church of God, 7th Day Adventists, and others.  As far as I know , there is no denomination that has taken an official position in favor of a pre-trib rapture.  Most denominations have refused to take a stand on the idea and allow their pastors to teach whatever their convictions including Methodist, Baptists, Assemblies of God, and most others.

The following is a table of major denominations

Catholic	1.2 billion
Orthodox	315 million
Anglicanism	85 million
Lutheran	75 million
Presbyterian	40 million
Baptist	100 million
Methodist	75 million
Assemblies of God	60 million
Vineyard	25 million
7th Day Adventist	17 million
Others	200-400 million  (with those not mentioned at 15 million or below)

Those in red (1.7 billion or 75%-80% of Christiandom) have taken an official position, at the denominational level, against the concept of a pre-trib rapture.  The others have taken no official view and allow for diverse views.  So only about 10%-15% of Christiandom has accepted this concept.

Shalom,

Joe