Aim: This study was planned to investigate the relationship between neck pain and disability with smartphone use addiction.Material and Method: 501 students from Kars Kafkas University and Istanbul Biruni University were included in the study.Inclusion criteria were being a university student, being a smartphone user, and not having any history of systemic, neurological or psychiatric diseases.All participants were evaluated with smartphone addiction scale (SAS), Visuel Analogue Scale (VAS) and Neck Disability Index (NDI) for neck pain. Results:The mean age of the 501 university students included was 21.0±1.9.57.7% of the participants were female and 42.3% were male.The mean VAS of the neck pain was 3.8 (±2.2), the mean SAS was 94.6 (±27.1), and the mean NDI was 10.6 (±7.0).Significant difference was not found between the genders in terms of SAS scores (p>0.05).The VAS and SAS scores were significantly higher in the moderate-severe-totally disability group than the mild disability and non-disability group (p>0.05).According to spearman correlation analysis, there was a significant positive correlation between SAS and VAS and NDI scores (p value 0.005, 0.001, respectively). Conclusion:Addiction to smartphone use was associated with neck pain and disability in healthy young adults.These results reveal the importance of informing the society about the physical risks of smartphone addiction.Individuals should strive to reduce the time spent using a smartphone and try to maintain a proper posture during use.