Academic dishonesty has been an important issue. However, only few researches had been done in Asian countries, especially a nationwide study. A sample of 2,068 college students throughout Taiwan was selected and surveyed on four domains of academic dishonesty, including: cheating on test, cheating on assignment, plagiarism, and falsifying documents. The major findings of this study were: (1) the prevalence rate for all types of dishonesty behaviors among college students in Taiwan was 61.72%; (2) the top five most practiced academic dishonesty behaviors in Taiwan are provided paper or assignment for another student, gave prohibited help to others on their assignment, copied others' assignments, passed answers to other students, and copied from other students; (3) students' attitudes correlated with behaviors in all four domains of academic dishonesty; (4) females reported less acceptable to and behaved less academic dishonesty behaviors than males; and (5) freshmen had more dishonest practices than other class ranks.