Purpose: This study aimed to determine the correlation between smartphone addiction and loneliness levels in nursing students. Design and Methods: The study has a descriptive and cross-sectional study design and was carried out with 682 nursing students. In the study, a "Student Information Form", the "Smartphone Addiction Scale-Short Form", and the "University of California Los Angeles Loneliness Scale" were used. Findings: The study found that nursing students had moderate scores for smartphone addiction and lonelinessand that there was a positive correlation between smartphone addiction and loneliness. Practical Implications: Nursing students are at risk of smartphone addiction and this may lead to negative psychosocial effects. Considering these results, interventions should be planned.