This multi-manuscript dissertation comprises two interconnected articles that collectively explore the experiences of college students with intellectual or developmental disabilities (IDD) engaging in wellness interventions within inclusive postsecondary education (IPSE) settings in the southeastern region of the United States. Wellness interventions within both manuscripts adhere to procedures outlined by the Wellness Counseling Intervention (WCI; Barrio Minton et al., n.d.) and group adaptation (WCI-G; Ohrt & Castle, n.d.). Manuscript 1 (Chapter 3) involves a mixed-method approach to understand the experiences six student participants, group members, engaging in the WCI-G across a total of 10-weeks. Manuscript 2 (Chapter 4) adheres to consensual qualitative research (CQR; Hill & Knox, 2021) methodology to explore the experiences of 15 college student participants with IDD across their six-week enrollment in the WCI. All participants in both studies were enrolled in the same, southeastern IPSE program. Findings from both studies are further elaborated in on in their respective chapters, and a culmination of both manuscript findings, limitations, implications, and future research directions can be found in Chapter Five. Overall, this dissertation aims to advance the understanding of wellness counseling interventions for college-age students with IDD in IPSE programs, offering a rich exploration of both group-based and individualized approaches and their implications for counselors, counselor educators, inclusive university programs, stakeholders, and future research. [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.]