Counselor cognitive complexity is a counselor’s ability to recognize and organize multiple characteristics that might affect client needs. I examined whether various admissions criteria–Graduate Record Examination (GRE) Verbal, Quantitative, and Analytical Writing scores; previous coursework grade point averages; and faculty co-leaders’ admissions group interview ratings–for 182 applicants to a southwestern U.S. CACREP-accredited master’s counseling program predicted cognitive complexity scores on a modified Counselor Cognitions Questionnaire (CCQ). Participants were predominantly ages 20 to 30 years (91.8%), female (91.8%), and White (81.3%). Multiple regression analyses showed statistical significance with small effect sizes: the admissions criteria together significantly predicted cognitive complexity differentiation (p = .033), accounting for 6.6% of variance, and cognitive complexity integration (p = .003), accounting for 9.8% of variance. The small effect sizes and low variance percentages support the idea that cognitive complexity measured by the modified CCQ is a substantially different phenomenon from commonly-assessed academic aptitude and personality characteristics. If future researchers confirm these findings with additional samples, subsequent researchers could determine whether one or both domains of cognitive complexity, either alone or in combination with one or more of the commonly used admissions criteria, could help counselor educators better predict which applicants will be successful in master’s programs and the counseling field.