Subjective well-being is a form of self-evaluation of life by referring to cognitive and affective aspects. This systematic review analyzes 13 international journals on factors influencing older adults' subjective well-being. The review planning uses the SPIDER formulation: Sample, Phenomenon of Interest, Design, Evaluation, and Research Type. This review analysis shows that older people can feel the meaning and satisfaction of life, spread positive things, and have a sense of security and happiness. The results of the systematic review analysis show that various factors influence subjective well-being in the elderly. Several factors can influence subjective well-being in terms of demographics, social activities, physiological factors, and psychological factors. Among them are volunteer activities, economic income, family support, participation in various social and religious activities, education, physical health, income satisfaction, spirituality and religiosity, positive experiences and emotions, sleep quality, self-efficacy, and internet use. These results can be a reference and recommendation for conducting further and more specific research on subjective well-being factors in older adults.