The status of being single is a significant factor in many countries today. The phenomenon of men choosing to be voluntarily single is also prevalent in Indonesia. Amidst various demands and social stigmas, voluntary single men want to maintain their life satisfaction even without romantic relationships and marriage. Mindfulness can act as a protective factor for stigmatised groups, such as single men, by facilitating a process of self-evaluation that may lead to enhanced life satisfaction. This study aims to explain the contribution of mindfulness to life satisfaction among voluntary single men in Indonesia. A cross-sectional study was used in this research. A total of 205 respondents were involved in this study, which were obtained by accidental sampling. The population criteria included: (1) Men aged 20–40 years (M = 24.9 SD = 4.3), (2) voluntarily single, (3) unmarried and not in a relationship, (4) citizens and domiciled in Indonesia. We utilised the Five Facets of Mindfulness Questionnaire and the Satisfaction with Life Scale as instruments in this study. The results demonstrated that mindfulness could affect the life satisfaction of voluntary single men (F = 10.6) with p = .001. Mindfulness contributed 4.5% to life satisfaction (R square = .045). It is recommended that further studies be conducted on this topic, with a particular focus on mindful skills training, which could enhance the mindful traits that have been investigated in this study.