This study was conducted to examine the effect of peer education on sleep hygiene sleep quality and psychological resilience in university students living in dormitories. In the study, a quasi-experimental method with a pretest-posttest control group was used. 240 university students staying at Akyazı Credit and Dormitories Institution in Akyazı district of Sakarya province participated in the study. Half of the students (n=120) formed the intervention group and the other half (n=120) formed the control group. Before the study, 20 students were given sleep hygiene training by the research team. The training group provided peer education to the intervention group on sleep hygiene. No intervention was made in the control group. Student diagnostic form, Sleep Hygiene Index, Pittsburgh Sleep Quality Index, and Brief Psychological Resilience Scale were used as data collection tools. There was no statistically significant difference between the Sleep Hygiene Index and Brief Psychological Resilience Scale score averages of the intervention and control group students included in the study at the beginning and the last interview (p>0.05). However, it was determined that there was an improvement in the sleep hygiene and psychological resilience levels of the students in the intervention group (p0.05). In addition, it was determined that the intervention group had a significant improvement in subjective sleep quality and sleep latency, which are sub-dimensions of the Pittsburgh Sleep Quality Index (p