This study explored the relation between a concern for truth (a measure of critical thinking disposition), the big five personality traits, and demographic variables. College students (N = 367, 75% women) completed an online survey that assessed a concern for truth and personality. Correlational analysis indicated a concern for truth was significantly related to openness, neuroticism, and agreeableness. Stepwise multiple regression analysis showed that openness, age, grade point average (GPA), neuroticism, and class rank were significant predictors of a concern for truth. Openness was the most significant predictor of a concern for truth and accounted for 13% of the variance between students. Implications of these findings in relation to critical thinking education and future research are discussed