The purpose of this study was to determine the impact that participation in co-curricular activities has on the academic performance and retention of students at an urban community college. This study utilized archived data to make quantitative analyses of the impact of participation in co-curricular activities on GPA scores and one-semester retention. The study included all of the students at Metro Community College who participated in one of the following activities during the 2018-2019 academic year: club member, club leader, leadership training, and mentee by a peer. Multiple regression was run to test the impact of participation in these activities on grade point average and a binomial logistic regression was run to test the impact of participation on one-semester retention. The study supported the previous research that found that participation in co-curricular activities impacted GPA scores and one-semester retention. These results strengthen previous research by analyzing data, verified by the institution, from all of the students who participated in co-curricular activities rather than utilizing student responses in surveys. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]