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It is difficult to accurately determine the proportion of the population that is atheist because survey definitions, and even real life definitions, are often unclear. In addition, many people are unsure of the existance of God, making them technically [[agnostic]], but they are sometimes counted as atheists. It is also important to keep in mind that surveys containing an option for "no religion" are not necessarily identifying atheists. Indeed, many individuals may believe strongly in some form of god but not subscribe to any particular religion, and as a result could enter a response of "no religion" on surveys.   

It is difficult to accurately determine the proportion of the population that is atheist because survey definitions, and even real life definitions, are often unclear. In addition, many people are unsure of the existance of God, making them technically [[agnostic]], but they are sometimes counted as atheists. It is also important to keep in mind that surveys containing an option for "no religion" are not necessarily identifying atheists. Indeed, many individuals may believe strongly in some form of god but not subscribe to any particular religion, and as a result could enter a response of "no religion" on surveys.   

Specific research on atheists conducted in 2006 [http://www.harrisinteractive.com/news/allnewsbydate.asp?NewsID=1131 suggests] that the true proportion of atheists is 4% in the United States, 17% in Great Britain and 32% in France.  If agnostics are included then the proportions are 18%, 52% and 64% respectively.

Specific research on atheists conducted in 2006 [http://www.harrisinteractive.com/news/allnewsbydate.asp?NewsID=1131 suggests] that the true proportion of atheists is 4% in the United States, 17% in Great Britain and 32% in France.