• Albert Einstein, one of the greatest scientists of the 20th century and an important contributor to quantum mechanics (not to mention the Theory of Relativity), was a Deist (he referenced and spoke of a divinity as well as referring to the universe as "creation," although he explicitly rejected belief in the concept of a personal god).
• Kurt Godel, a highly respected mathematician and widely regarded as one of the three most important logicians of human history, was deeply religious.

In addition to high-IQ intellectuals, there are many scientists, living or dead, who are religious or at least believers in God's existence. Some of these scientists are responsible for significant modern achievements and breakthroughs:

• Francis Collins, a leading American geneticist who is the current director of the Human Genome Project. He oversaw completion of the mapping of human DNA. He is also a Christian, having converted from atheism (he has described his past behavior as an atheist college student as "obnoxious").
• Donald Knuth, a Lutheran, is an important contributor to the field of computer science. Considered to be one of the world's most influential computer programmers, he broke important ground in theoretical computer science and analysis of algorithms. He is also the author of one of the most respected references in computer science, The Art of Computer Programming.
  

Religious scientists are more numerous than militant atheists are willing to admit. The British organization Christians in Science has over 650 members. Even more telling, a recent survey found two-thirds of American scientists in research universities to be theistic or religious. This study did not examine individual religions or the scope of which the scientists were theist, but merely their belief as to whether there is indeed a divinity.

References:
LiveScience Article
Washington Times Article