The hypothesis that happy and unhappy people have different personality profiles based on five personality factors (Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness) was tested using 245 undergraduates (111 men and 134 women) who completed the Satisfaction with Life Scale and the NEO Personality Inventory. Analysis indicated that High and Lour Satisfaction groups had significantly different personality profiles, supporting the hypothesis.