OBJECTIVE: No lifetime utilization of mental health treatment (NUMT) is an indicator of the treatment gap among people in need of treatment. Until now, the overall prevalence and predictors of NUMT have never been explored in France. METHODS: In a 39,617-respondent survey, participants were assessed for NUMT, i.e., no lifetime psychotherapy, psychopharmacotherapy, or psychiatric hospitalization. Mental disorders were investigated using the Mini International Neuropsychiatric Interview (MINI 5.0.0). MINI diagnoses were grouped into five categories: mood disorders (MDs); anxiety disorders (ADs); alcohol use disorders (AUDs); substance use disorders (SUDs); and psychotic disorders (PDs). Using multivariable logistic regression models, we explored the factors associated with NUMT among the MINI-positive respondents. The odds ratio and 95% confidence interval were calculated for each factor. RESULTS: In total, 12,818 (32.4%) respondents were MINI-positive, 46.5% of them reported NUMT (35.6% for MDs, 39.7% for PDs, 42.8% for ADs, 56.0% for AUDs, and 56.7% for SUDs). NUMT was positively associated with being male [OR 1.75 (1.59-1.91)] and practising religion [OR 1.13 (1.02-1.25)] and negatively associated with ageing [per 10-year increase: OR 0.88 (0.85-0.91)], being single [OR 0.74 (0.66-0.84)], being a French native [OR 0.67 (0.60-0.75)], and experiencing MDs [OR 0.39 (0.36-0.43)], ADs [OR 0.47 (0.43-0.52)], AUDs [OR 0.83 (0.73-0.96)], SUDs [OR 0.77 (0.65-0.91)], or PDs [OR 0.50 (0.43-0.59)]. CONCLUSIONS: In France, NUMT rates were the highest for AUDs and SUDs. Additionally, suffering from MDs or ADs increased the lifetime treatment utilization for people having any other mental disorder. This finding emphasizes the need to better screen AUDs and SUDs among people treated for MDs or ADs.