The purpose of this study is to examine life-satisfaction, and the influence of religion. 2 samples, 1 from Ireland, 1 from Turkey, were used, where 75 participants were randomly sampled from each country, filled out a questionnaire containing 121 questions. It is a cross-sectional independent samples design. The results showed that the greater the religious belief and practices of the respondents, the greater the life-satisfaction, and that there was a significant difference between the 2 samples. The study shows that while Life Satisfaction is influenced by extraversion, education, income, and social support. While there is very little research in this type of area, within Ireland and Turkey, the different factors used in this survey should be able to explain life satisfaction levels.