This investigation seeks to determine whether certain personality traits of college students are related to their smoking habits. The purpose of the study is to determine whether significant personality differences exist among college students who can be classified as light smokers, heavy smokers, ex-smokers, and nonsmokers and to determine the nature of the differences. The study involved four male experimental groups and four female experimental groups, assigned on the basis of sex and cigarette smoking habits as ascertained from a questionnaire. A total of 191 subjects from two junior colleges comprised the sample. The Edwards Personal Preference Schedule (EPPS), the Tennessee Self Concept Scale (TSCS), and a questionnaire to obtain information on each subject's smoking habits were administered to the subjects at one sitting. Comparisons of the group means of each of the four classifications of smokers and nonsmokers were accomplished by a one-way analysis-of-variance design.