The association between serum 25-hydroxyvitamin D [25(OH)D] concentrations and snoring is unclear. We aimed to investigate the association between serum 25(OH)D concentrations and snoring in adults in Sudan. A community-based matched case-control (for age and sex) study was conducted in the Wad Hamid district in northern Sudan. The cases (98) comprised adults who snored, and the controls (140) were non-snoring adults. A questionnaire was used to collect the sociodemographic data, and serum 25(OH)D was measured. Multivariate binary regression (conditional) analysis was performed. Compared with the controls, snoring adults had lower 25(OH)D levels (14.0 [10.4‒20.9] vs. 15.6 [11.8‒22.9], P = 0.016) ng/ml. More snoring adults had vitamin D deficiency compared to the controls (74.5% vs. 60.7%, P = 0.026). Serum 25(OH)D levels were inversely associated with snoring in adults (AOR = 0.96, 95% CI = 0.93-0.99), vitamin D deficiency increased the odds of snoring (AOR = 1.89, 95% CI = 1.07-3.33). Age, sex, education, and body mass index were not associated with snoring. The study revealed a significant positive association between vitamin D deficiency and snoring in adults. This supports the literature, suggesting that adequate vitamin D is needed to prevent snoring and its complications.