The New York Times has a chart listing the 2013 College Acceptance Rates for many of the most selective colleges.
The chart lists the name of the college, the number of 2013 total applicants, the number of 2013 applicants accepted, the number denied, the number waitlisted as well as the admit rate for any early admissions program the college has, the regular admit rate and the overall admit rate.
Beneath the 2013 chart are the charts for 2012 and 2011 so that you can compare application and acceptance numbers from the past 3 years.
I am bringing this to your attention because I think it important to understand how competitive college admissions is at some of the most well known colleges.
HOWEVER, do not forget that despite the dismal numbers reflected in these charts, most colleges in the US actually accept most of the students that apply. And even for these highly selective colleges, there are some students that still do get accepted despite the odds.