The purpose of this quantitative comparative study was to examine if and to what extent a statistically significant difference exists in advising satisfaction and outreach function of online and on-campus undergraduate criminology and criminal justice students in the Southwestern United States. The concepts of advising satisfaction and outreach function through the theoretical lens of developmental advising by Crookston and O'Banion were used in this study to address the problem, purpose, and significance of the study. Two research questions examined if a difference existed between advising satisfaction and outreach function between online students and on-campus students. The sample consisted of 209 participants (117 online students and 92 online students) who completed the Advising Survey by Teasley and Buchanan. Data were analyzed using the nonparametric Mann-Whitney U test to determine if a statistically significant difference existed between the online students and on-campus students for advising satisfaction (RQ1) and outreach function (RQ2). Advising satisfaction scores were not statistically significant different between online students (Mdn = 119) and on-campus students (Mdn = 117), U = 4925.5, z = -1.052, p = 0.293. Outreach function scores were not statistically significant different between online students (Mdn = 16) and on-campus students (Mdn = 16), U = 5292.0, z = -0.208, p = 0.835. The number of online learners continues to increase and advising is cited as critical to retention, engagement, time to degree, and persistence. Satisfied students are more likely to have positive student outcomes and this study was one of the first to compare advising satisfaction and outreach function between online and on-campus students. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]